Document:

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                                                                EXHIBIT 4.1

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                                CEPHALON, INC.

         2 1/2% CONVERTIBLE SUBORDINATED NOTES DUE DECEMBER 15, 2006

                             --------------------

                                  INDENTURE
                        DATED AS OF DECEMBER 11, 2001

                             --------------------

                     STATE STREET BANK AND TRUST COMPANY,
                                  AS TRUSTEE

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                            CROSS-REFERENCE TABLE*
<TABLE>
<CAPTION>

TIA                                                                                               INDENTURE
SECTION                                                                                            SECTION
--------                                                                                      --------------
<S>             <C>                                                                         <C>

Section           310(a)(1).................................................................  9.10
                  (a)(2)....................................................................  9.10
                  (a)(3)....................................................................  N.A.**
                  (a)(4)....................................................................  N.A.
                  (a)(5)....................................................................  9.10
                  (b).......................................................................  9.8; 9.10
                  (c).......................................................................  N.A.
Section           311(a)....................................................................  9.11
                  (b).......................................................................  9.11
                  (c).......................................................................  N.A.
Section           312(a)....................................................................  2.5
                  (b).......................................................................  12.3
                  (c).......................................................................  12.3
Section           313(a)....................................................................  9.6
                  (b)(1)....................................................................  N.A.
                  (b)(2)....................................................................  9.6
                  (c).......................................................................  9.6; 12.2
                  (d).......................................................................  9.6
Section           314(a)....................................................................  6.2; 6.4; 12.2
                  (b).......................................................................  N.A.
                  (c)(1)....................................................................  12.4(a)
                  (c)(2)....................................................................  12.4(a)
                  (c)(3)....................................................................  N.A.
                  (d).......................................................................  N.A.
                  (e).......................................................................  12.4(b)
                  (f).......................................................................  N.A.
Section           315(a)....................................................................  9.1(b)
                  (b).......................................................................  9.5; 12.2
                  (c).......................................................................  9.1(a)
                  (d).......................................................................  9.1(c)
                  (e).......................................................................  8.11
Section           316(a)(last sentence).....................................................  2.9
                  (a)(1)(A).................................................................  8.5
                  (a)(1)(B).................................................................  8.4
                  (a)(2)....................................................................  N.A.
                  (b).......................................................................  8.7
                  (c).......................................................................  12.5
Section           317(a)(1).................................................................  8.8
                  (a)(2)....................................................................  8.9
                  (b).......................................................................  2.4
</TABLE>

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*  This Cross-Reference Table shall not, for any purpose, be deemed a part of
this Indenture.

**  N.A. means Not Applicable.

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                              TABLE OF CONTENTS

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<S>         <C>                  <C>                                                                            <C>

ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE..............................................................2

            SECTION 1.1.         DEFINITIONS......................................................................2
            SECTION 1.2.         OTHER DEFINITIONS................................................................7
            SECTION 1.3.         TRUST INDENTURE ACT PROVISIONS...................................................7
            SECTION 1.4.         RULES OF CONSTRUCTION............................................................8

ARTICLE 2 THE SECURITIES..........................................................................................8

            SECTION 2.1.         FORM AND DATING..................................................................8
            SECTION 2.2.         EXECUTION AND AUTHENTICATION....................................................10
            SECTION 2.3.         REGISTRAR, PAYING AGENT AND CONVERSION AGENT....................................10
            SECTION 2.4.         PAYING AGENT TO HOLD MONEY IN TRUST.............................................11
            SECTION 2.5.         SECURITYHOLDER LISTS............................................................11
            SECTION 2.6.         TRANSFER AND EXCHANGE...........................................................11
            SECTION 2.7.         REPLACEMENT SECURITIES..........................................................12
            SECTION 2.8.         OUTSTANDING SECURITIES..........................................................13
            SECTION 2.9.         TREASURY SECURITIES.............................................................13
            SECTION 2.10.        TEMPORARY SECURITIES............................................................13
            SECTION 2.11.        CANCELLATION....................................................................14
            SECTION 2.12.        LEGEND; ADDITIONAL TRANSFER AND EXCHANGE REQUIREMENTS...........................14
            SECTION 2.13.        CUSIP NUMBERS...................................................................16

ARTICLE 3 REDEMPTION AND PURCHASES...............................................................................16

            SECTION 3.1.         RIGHT TO REDEEM; NOTICE TO TRUSTEE..............................................16
            SECTION 3.2.         SELECTION OF SECURITIES TO BE REDEEMED..........................................17
            SECTION 3.3.         NOTICE OF REDEMPTION............................................................17
            SECTION 3.4.         EFFECT OF NOTICE OF REDEMPTION..................................................18
            SECTION 3.5.         DEPOSIT OF REDEMPTION PRICE.....................................................18
            SECTION 3.6.         SECURITIES REDEEMED IN PART.....................................................18
            SECTION 3.7.         CONVERSION ARRANGEMENT ON CALL FOR REDEMPTION...................................18
            SECTION 3.8.         PURCHASE OF SECURITIES AT OPTION OF THE HOLDER UPON CHANGE IN CONTROL...........19
            SECTION 3.9.         EFFECT OF CHANGE IN CONTROL PURCHASE NOTICE.....................................22
            SECTION 3.10.        DEPOSIT OF CHANGE IN CONTROL PURCHASE PRICE.....................................22
            SECTION 3.11.        SECURITIES PURCHASED IN PART....................................................22
            SECTION 3.12.        COMPLIANCE WITH SECURITIES LAWS UPON PURCHASE OF SECURITIES.....................23
            SECTION 3.13.        REPAYMENT TO THE COMPANY........................................................23

ARTICLE 4 CONVERSION.............................................................................................23

            SECTION 4.1.         CONVERSION PRIVILEGE............................................................23
            SECTION 4.2.         CONVERSION PROCEDURE............................................................24
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                                 (continued)

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<S>         <C>                  <C>                                                                            <C>
            SECTION 4.3.         FRACTIONAL SHARES...............................................................25
            SECTION 4.4.         TAXES ON CONVERSION.............................................................25
            SECTION 4.5.         COMPANY TO PROVIDE STOCK........................................................25
            SECTION 4.6.         ADJUSTMENT OF CONVERSION PRICE..................................................25
            SECTION 4.7.         NO ADJUSTMENT...................................................................30
            SECTION 4.8.         ADJUSTMENT FOR TAX PURPOSES.....................................................30
            SECTION 4.9.         NOTICE OF ADJUSTMENT............................................................30
            SECTION 4.10.        NOTICE OF CERTAIN TRANSACTIONS..................................................30
            SECTION 4.11.        EFFECT OF RECLASSIFICATION, CONSOLIDATION, MERGER OR SALE ON
                                 CONVERSION PRIVILEGE............................................................31
            SECTION 4.12.        TRUSTEE'S DISCLAIMER............................................................32
            SECTION 4.13.        VOLUNTARY REDUCTION.............................................................32

ARTICLE 5 SUBORDINATION..........................................................................................32

            SECTION 5.1.         AGREEMENT OF SUBORDINATION......................................................32
            SECTION 5.2.         PAYMENTS TO HOLDERS.............................................................33
            SECTION 5.3.         SUBROGATION OF SECURITIES.......................................................35
            SECTION 5.4.         AUTHORIZATION TO EFFECT SUBORDINATION...........................................36
            SECTION 5.5.         NOTICE TO TRUSTEE...............................................................36
            SECTION 5.6.         TRUSTEE'S RELATION TO SENIOR INDEBTEDNESS.......................................37
            SECTION 5.7.         NO IMPAIRMENT OF SUBORDINATION..................................................37
            SECTION 5.8.         CERTAIN CONVERSIONS DEEMED PAYMENT..............................................37
            SECTION 5.9.         ARTICLE APPLICABLE TO PAYING AGENTS.............................................37
            SECTION 5.10.        SENIOR INDEBTEDNESS ENTITLED TO RELY............................................38

ARTICLE 6 COVENANTS..............................................................................................38

            SECTION 6.1.         PAYMENT OF SECURITIES...........................................................38
            SECTION 6.2.         SEC REPORTS.....................................................................38
            SECTION 6.3.         COMPLIANCE CERTIFICATES.........................................................38
            SECTION 6.4.         FURTHER INSTRUMENTS AND ACTS....................................................39
            SECTION 6.5.         MAINTENANCE OF CORPORATE EXISTENCE..............................................39
            SECTION 6.6.         RULE 144A INFORMATION REQUIREMENT...............................................39
            SECTION 6.7.         STAY, EXTENSION AND USURY LAWS..................................................39
            SECTION 6.8.         PAYMENT OF ADDITIONAL INTEREST..................................................39

ARTICLE 7 CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE...................................................40

            SECTION 7.1.         COMPANY MAY CONSOLIDATE, ETC, ONLY ON CERTAIN TERMS.............................40
            SECTION 7.2.         SUCCESSOR SUBSTITUTED...........................................................40

ARTICLE 8 DEFAULT AND REMEDIES...................................................................................41

            SECTION 8.1.         EVENTS OF DEFAULT...............................................................41
            SECTION 8.2.         ACCELERATION....................................................................42
            SECTION 8.3.         OTHER REMEDIES..................................................................43
            SECTION 8.4.         WAIVER OF DEFAULTS AND EVENTS OF DEFAULT........................................43
</TABLE>

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                                 (continued)

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<S>         <C>                  <C>                                                                            <C>
            SECTION 8.5.         CONTROL BY MAJORITY.............................................................43
            SECTION 8.6.         LIMITATIONS ON SUITS............................................................43
            SECTION 8.7.         RIGHTS OF HOLDERS TO RECEIVE PAYMENT AND TO CONVERT.............................44
            SECTION 8.8.         COLLECTION SUIT BY TRUSTEE......................................................44
            SECTION 8.9.         TRUSTEE MAY FILE PROOFS OF CLAIM................................................44
            SECTION 8.10.        PRIORITIES......................................................................45
            SECTION 8.11.        UNDERTAKING FOR COSTS...........................................................45

ARTICLE 9 TRUSTEE................................................................................................45

            SECTION 9.1.         DUTIES OF TRUSTEE...............................................................45
            SECTION 9.2.         RIGHTS OF TRUSTEE...............................................................46
            SECTION 9.3.         INDIVIDUAL RIGHTS OF TRUSTEE....................................................47
            SECTION 9.4.         TRUSTEE'S DISCLAIMER............................................................47
            SECTION 9.5.         NOTICE OF DEFAULT OR EVENTS OF DEFAULT..........................................47
            SECTION 9.6.         REPORTS BY TRUSTEE TO HOLDERS...................................................47
            SECTION 9.7.         COMPENSATION AND INDEMNITY......................................................48
            SECTION 9.8.         REPLACEMENT OF TRUSTEE..........................................................48
            SECTION 9.9.         SUCCESSOR TRUSTEE BY MERGER, ETC................................................49
            SECTION 9.10.        ELIGIBILITY; DISQUALIFICATION...................................................49
            SECTION 9.11.        PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY...............................49

ARTICLE 10 SATISFACTION AND DISCHARGE............................................................................50

            SECTION 10.1.        SATISFACTION AND DISCHARGE......................................................50
            SECTION 10.2.        APPLICATION OF TRUST MONEY......................................................51
            SECTION 10.3.        REPAYMENT TO COMPANY............................................................51
            SECTION 10.4.        REINSTATEMENT...................................................................51

ARTICLE 11 AMENDMENTS, SUPPLEMENTS AND WAIVERS...................................................................51

            SECTION 11.1.        WITHOUT CONSENT OF HOLDERS......................................................51
            SECTION 11.2.        WITH CONSENT OF HOLDERS.........................................................52
            SECTION 11.3.        COMPLIANCE WITH TRUST INDENTURE ACT.............................................53
            SECTION 11.4.        REVOCATION AND EFFECT OF CONSENTS...............................................53
            SECTION 11.5.        NOTATION ON OR EXCHANGE OF SECURITIES...........................................53
            SECTION 11.6.        TRUSTEE TO SIGN AMENDMENTS, ETC.................................................53
            SECTION 11.7.        EFFECT OF SUPPLEMENTAL INDENTURES...............................................54

ARTICLE 12 MISCELLANEOUS.........................................................................................54

            SECTION 12.1.        TRUST INDENTURE ACT CONTROLS....................................................54
            SECTION 12.2.        NOTICES.........................................................................54
            SECTION 12.3.        COMMUNICATIONS BY HOLDERS WITH OTHER HOLDERS....................................55
            SECTION 12.4.        CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT..............................55
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<S>         <C>                  <C>                                                                            <C>
            SECTION 12.5.        RECORD DATE FOR VOTE OR CONSENT OF SECURITYHOLDERS..............................55
            SECTION 12.6.        RULES BY TRUSTEE, PAYING AGENT, REGISTRAR AND CONVERSION AGENT..................56
            SECTION 12.7.        LEGAL HOLIDAYS..................................................................56
            SECTION 12.8.        GOVERNING LAW...................................................................56
            SECTION 12.9.        NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS...................................56
            SECTION 12.10.       NO RECOURSE AGAINST OTHERS......................................................56
            SECTION 12.11.       SUCCESSORS......................................................................56
            SECTION 12.12.       MULTIPLE COUNTERPARTS...........................................................56
            SECTION 12.13.       SEPARABILITY....................................................................56
            SECTION 12.14.       TABLE OF CONTENTS, HEADINGS, ETC................................................57
</TABLE>
                                     iv

<PAGE>

         THIS INDENTURE dated as of December 11, 2001 is between Cephalon,
Inc., a corporation duly organized under the laws of the State of Delaware
(the "Company"), and State Street Bank and Trust Company, a trust company
organized and existing under the laws of the State of Connecticut, as Trustee
(the "Trustee").

         In consideration of the premises and the purchase of the Securities
by the Holders thereof, both parties agree as follows for the benefit of the
other and for the equal and ratable benefit of the registered Holders of the
Securities.

                                  ARTICLE 1
                  DEFINITIONS AND INCORPORATION BY REFERENCE

         SECTION 1.1.      DEFINITIONS.

         "Additional Interest" has the meaning specified in Section 5 of the
Registration Rights Agreement. All references herein to interest accrued or
payable as of any date shall include any Additional Interest accrued or
payable as of such date as provided in the Registration Rights Agreement.

         "Affiliate" means, with respect to any specified person, any other
person directly or indirectly controlling or controlled by or under direct or
indirect common control with such specified person. For the purposes of this
definition, "control" when used with respect to any person means the power to
direct the management and policies of such person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

         "Agent" means any Registrar, Paying Agent or Conversion Agent.

         "Applicable Procedures" means, with respect to any transfer or
exchange of beneficial ownership interests in a Global Security, the rules and
procedures of the Depositary, in each case to the extent applicable to such
transfer or exchange.

         "Board of Directors" means either the board of directors of the
Company or any committee of the Board of Directors specifically authorized to
act for it with respect to this Indenture.

         "Business Day" means each day that is not a Legal Holiday.

         "Capital Stock" of any Person means any and all shares, interests,
rights to purchase, warrants, options, participations or other equivalents of
or interests in (however designated) equity of such Person, but excluding any
debt securities convertible into such equity.

         "Cash" or "cash" means such coin or currency of the United States as
at any time of payment is legal tender for the payment of public and private
debts.

         "Certificated Security" means a Security that is in substantially the
form attached hereto as Exhibit A and that does not include the information or
the schedule called for by footnotes 1, 3 and 4 thereof.

         "Common Stock" means the common stock of the Company, $0.01 par
value, as it exists on the date of this Indenture and any shares of any class
or classes of capital stock of the Company resulting from any reclassification
or reclassifications thereof and which have no preference in respect of
dividends or of amounts payable in the event of any voluntary or involuntary
liquidation, dissolution or winding-up

                                      2
<PAGE>

of the Company and which are not subject to redemption by the Company;
provided, however, that if at any time there shall be more than one such
resulting class, the shares of each such class then so issuable on conversion
of Securities shall be substantially in the proportion which the total number
of shares of such class resulting from all such reclassifications bears to the
total number of shares of all such classes resulting from all such
reclassifications.

         "Company" means the party named as such in the first paragraph of
this Indenture until a successor replaces it pursuant to the applicable
provisions of this Indenture, and thereafter "Company" shall mean such
successor Company.

         "Corporate Trust Office" means the office of the Trustee at which at
any time the trust created by this Indenture shall be administered, which
office at the date of the execution of this Indenture is located at Goodwin
Square, 225 Asylum Street, Hartford, CT 06103, Attention: Corporate Trust
Administration (Cephalon, Inc. -- 2 1/2% Convertible Subordinated Notes due
December 15, 2006) or at any other time at such other address as the Trustee
may designate from time to time by notice to the Company.

         "Default" or "default" means, when used with respect to the
Securities, any event which is or, after notice or passage of time or both,
would be an Event of Default.

         "Designated Senior Indebtedness" means any particular Senior
Indebtedness of the Company in which the instrument creating or evidencing the
same or the assumption or guarantee thereof (or any related agreements or
documents to which the Company is a party) expressly provides that such Senior
Indebtedness shall be "Designated Senior Indebtedness" for purposes of this
Indenture (provided that such instrument, agreement or other document may
place limitations and conditions on the right of such Senior Indebtedness to
exercise the rights of Designated Senior Indebtedness). If any payment made to
any holder of any Designated Senior Indebtedness or its Representative with
respect to such Designated Senior Indebtedness is rescinded or must otherwise
be returned by such holder or Representative upon the insolvency, bankruptcy
or reorganization of the Company or otherwise, the reinstated Indebtedness of
the Company arising as a result of such rescission or return shall constitute
Designated Senior Indebtedness effective as of the date of such rescission or
return.

         "Exchange Act" means the Securities and Exchange Act of 1934, as
amended, and the rules and regulations promulgated thereunder, as in effect
from time to time.

         "Final Maturity Date" means December 15, 2006.

         "GAAP" means generally accepted accounting principles in the United
States of America as in effect as of the date of this Indenture, including
those set forth in (1) the opinions and pronouncements of the Accounting
Principles Board of the American Institute of Certified Public Accountants,
(2) the statements and pronouncements of the Financial Accounting Standards
Board, (3) such other statements by such other entity as approved by a
significant segment of the accounting profession and (4) the rules and
regulations of the SEC governing the inclusion of financial statements
(including pro forma financial statements) in registration statements filed
under the Securities Act and periodic reports required to be filed pursuant to
Section 13 of the Exchange Act, including opinions and pronouncements in staff
accounting bulletins and other official written statements from the accounting
staff of the SEC expressing the views of the SEC therein.

         "Global Security" means a permanent Global Security that is in
substantially the form attached hereto as Exhibit A and that includes the
information and schedule called for by footnotes 1, 3 and 4 thereof and which
is deposited with the Depositary or its custodian and registered in the name
of the Depositary or its nominee.

                                      3
<PAGE>

         "Holder" or "Securityholder" means the person in whose name a
Security is registered on the Primary Registrar's books.

         "Indebtedness" means, with respect to any Person, without
duplication, (a) all indebtedness, obligations and other liabilities
(contingent or otherwise) of such Person (i) for borrowed money (including
obligations of such Person in respect of overdrafts, foreign exchange
contracts, currency exchange agreements, interest rate protection agreements,
and any loans or advances from banks, whether or not evidenced by notes or
similar instruments) or (ii) evidenced by credit or loan agreements, bonds,
debentures, notes or similar instruments (whether or not the recourse of the
lender is to the whole of the assets of such Person or to only a portion
thereof) (other than any accounts payable or other accrued current liability
or obligation incurred in the ordinary course of business in connection with
the obtaining of materials or services), (b) all reimbursement obligations and
other liabilities (contingent or otherwise) of such Person with respect to
letters of credit, bank guarantees or bankers' acceptances, (c) all
obligations and liabilities (contingent or otherwise) of such Person (i) in
respect of leases of such Person required, in conformity with GAAP, to be
accounted for as capitalized lease obligations on the balance sheet of such
Person (as determined by the Company), or (ii) under any lease or related
document (including a purchase agreement, conditional sale or other title
retention agreement) in connection with the lease of real property or
improvement thereon (or any personal property included as part of any such
lease) which provides that such Person is contractually obligated to purchase
or cause a third party to purchase the leased property or pay an agreed upon
residual value of the leased property to the lessor (whether or not such lease
transaction is characterized as an operating lease or a capitalized lease in
accordance with GAAP), (d) all obligations (contingent or otherwise) of such
Person with respect to any interest rate or other swap, cap, floor or collar
agreement, hedge agreement, forward contract, or other similar instrument or
agreement or foreign currency hedge, exchange, purchase or similar instrument
or agreement; (e) all direct or indirect guaranties, agreements to be jointly
liable or similar agreements by such Person in respect of, and obligations or
liabilities of such Person to purchase or otherwise acquire or otherwise
assure a creditor against loss in respect of, indebtedness, obligations or
liabilities of another Person of the kind described in clauses (a) through
(d), and (f) any and all deferrals, renewals, extensions, refinancings and
refundings of, or amendments, modifications or supplements to, any
indebtedness, obligation or liability of the kind described in clauses (a)
through (e).

         "Indenture" means this Indenture as amended or supplemented from time
to time pursuant to the terms of this Indenture.

         "Initial Purchasers" means Credit Suisse First Boston Corporation,
Robertson Stephens, Inc., CIBC World Markets Corp., SG Cowen Securities
Corporation, UBS Warburg LLC, U.S. Bancorp Piper Jaffray Inc., Adams, Harkness
& Hill, Inc. and Banc of America Securities LLC.

         "Officer" means the Chairman or any Co-Chairman of the Board, any
Vice Chairman of the Board, the Chief Executive Officer, the President, any
Vice President, the Chief Financial Officer, the Controller, the Secretary or
any Assistant Controller or Assistant Secretary of the Company.

         "Officers' Certificate" means a certificate signed by two Officers;
provided, however, that for purposes of Sections 4.11 and 6.3, "Officers'
Certificate" means a certificate signed by the principal executive officer,
principal financial officer or principal accounting officer of the Company and
by one other Officer.

         "Opinion of Counsel" means a written opinion from legal counsel. The
counsel may be an employee of or counsel to the Company or the Trustee.

                                      4
<PAGE>

         "Person" or "person" means any individual, corporation, partnership,
limited liability company, joint venture, association, joint-stock company,
trust, unincorporated organization, government or any agency or political
subdivision thereof or any other entity.

         "Principal" or "principal" of a debt security, including the
Securities, means the principal of the security plus, when appropriate, the
premium, if any, on the security.

         "Redemption Date" when used with respect to any Security to be
redeemed, means the date fixed for such redemption pursuant to this Indenture.

         "Redemption Price" when used with respect to any Security to be
redeemed, means the price fixed for such redemption pursuant to this
Indenture, as set forth in the form of Security annexed as Exhibit A hereto.

         "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of December 11, 2001, between the Company and the Initial
Purchasers.

         "Representative" means the (a) indenture trustee or other trustee,
agent or representative for any Senior Indebtedness or (b) with respect to any
Senior Indebtedness that does not have any such trustee, agent or other
representative, (i) in the case of such Senior Indebtedness issued pursuant to
an agreement providing for voting arrangements as among the holders or owners
of such Senior Indebtedness, any holder or owner of such Senior Indebtedness
acting with the consent of the required persons necessary to bind such holders
or owners of such Senior Indebtedness and (ii) in the case of all other such
Senior Indebtedness, the holder or owner of such Senior Indebtedness.

         "Restricted Global Security" means a Global Security that is a
Restricted Security.

         "Restricted Security" means a Security required to bear the
restricted legend set forth in the form of Security set forth in Exhibit A of
this Indenture.

         "Rule 144" means Rule 144 under the Securities Act or any successor
to such Rule.

         "Rule 144A" means Rule 144A under the Securities Act or any successor
to such Rule.

         "SEC" means the Securities and Exchange Commission.

         "Securities" means the 2 1/2% Convertible Subordinated Notes due
December 15, 2006 or any of them (each, a "Security"), as amended or
supplemented from time to time, that are issued under this Indenture.

         "Securities Act" means the Securities Act of 1933, as amended, and
the rules and regulations promulgated thereunder, as in effect from time to
time.

         "Securities Custodian" means the Trustee, as custodian with respect
to the Securities in global form, or any successor thereto.

         "Senior Indebtedness" means the principal of, premium, if any,
interest (including all interest accruing subsequent to the commencement of
any bankruptcy or similar proceeding, whether or not a claim for post-petition
interest is allowed as a claim in any such proceeding) and rent payable on or
in connection with, and all fees, costs, expenses and other amounts accrued or
due on or in connection with, Indebtedness of the Company, whether secured or
unsecured, absolute or contingent, due or to become

                                      5
<PAGE>

due, outstanding on the date of this Indenture or thereafter created,
incurred, assumed, guaranteed or in effect guaranteed by the Company
(including all deferrals, renewals, extensions or refundings of, or
amendments, modifications or supplements to, the foregoing), unless in the
case of any particular Indebtedness the instrument creating or evidencing the
same or the assumption or guarantee thereof expressly provides that such
Indebtedness shall not be senior in right of payment to the Securities or
expressly provides that such Indebtedness is "pari passu" or "junior" to the
Securities. Notwithstanding the foregoing, the term Senior Indebtedness shall
not include (i) any Indebtedness of the Company to any Subsidiary of the
Company (other than Indebtedness of the Company to such Subsidiary arising by
reason of guarantees by the Company of Indebtedness of such Subsidiary to a
Person that is not a Subsidiary of the Company) or (ii) Indebtedness for trade
payables or the deferred purchase price of assets or services incurred in the
ordinary course of business. If any payment made to any holder of any Senior
Indebtedness or its Representative with respect to such Senior Indebtedness is
rescinded or must otherwise be returned by such holder or Representative upon
the insolvency, bankruptcy or reorganization of the Company or otherwise, the
reinstated Indebtedness of the Company arising as a result of such rescission
or return shall constitute Senior Indebtedness effective as of the date of
such rescission or return.

         "Significant Subsidiary" means, in respect of any Person, a
Subsidiary of such Person that would constitute a "significant subsidiary" as
such term is defined under Rule 1-02 of Regulation S-X under the Securities
Act and the Exchange Act.

         "Subsidiary" means, in respect of any Person, any corporation,
association, partnership or other business entity of which more than 50% of
the total voting power of shares of Capital Stock or other interests
(including partnership interests) entitled (without regard to the occurrence
of any contingency) to vote in the election of directors, managers, general
partners or trustees thereof is at the time owned or controlled, directly or
indirectly, by (i) such Person; (ii) such Person and one or more Subsidiaries
of such Person; or (iii) one or more Subsidiaries of such Person.

         "TIA" means the Trust Indenture Act of 1939, as amended, and the
rules and regulations thereunder as in effect on the date of this Indenture
and except to the extent any amendment to the Trust Indenture Act expressly
provides for application of the Trust Indenture Act as in effect on another
date.

         "Trading Day" means, with respect to any security, each Monday,
Tuesday, Wednesday, Thursday and Friday, other than any day on which
securities are not generally traded on the principal exchange or market in
which such security is traded.

         "Trustee" means the party named as such in the first paragraph of
this Indenture until a successor replaces it in accordance with the provisions
of this Indenture, and thereafter means the successor.

         "Trust Officer" means, with respect to the Trustee, any officer
assigned to the Corporate Trust Office, and also, with respect to a particular
matter, any other officer to whom such matter is referred because of such
officer's knowledge of and familiarity with the particular subject.

         "Unrestricted Certificated Security" means a Certificated Security
that is not a Restricted Security.

         "Unrestricted Global Security" means a Global Security that is not a
Restricted Security.

         "Vice President" when used with respect to the Company or the
Trustee, means any vice president, whether or not designated by a number or a
word or words added before or after the title "vice president."

                                      6
<PAGE>

         "Voting Stock" of a Person means all classes of Capital Stock or
other interests (including partnership interests) of such Person then
outstanding and normally entitled (without regard to the occurrence of any
contingency) to vote in the election of directors, managers or trustees
thereof.

SECTION 1.2.      OTHER DEFINITIONS.

<TABLE>
<CAPTION>

                                           TERM                                                  DEFINED IN SECTION
----------------------------------------------------------------------------------------  ----------------------------
<S>                                                                                              <C>
"Agent Members"........................................................................                   2.1(b)
"Bankruptcy Law".......................................................................                   8.1
"Change in Control"....................................................................                   3.8(a)
"Change in Control Purchase Date"......................................................                   3.8(a)
"Change in Control Purchase Notice"....................................................                   3.8(c)
"Change in Control Purchase Price".....................................................                   3.8(a)
"Closing Price"........................................................................                   4.6(d)
"Company Order"........................................................................                   2.2
"Conversion Agent".....................................................................                   2.3
"Conversion Date"......................................................................                   4.2
"Conversion Price".....................................................................                   4.6
"Current Market Price".................................................................                   4.6(d)
"Custodian"............................................................................                   8.1
"DTC"..................................................................................                   2.1
"Depositary"...........................................................................                   2.1
"Determination Date"...................................................................                   4.6(c)
"Event of Default".....................................................................                   8.1
"Expiration Date"......................................................................                   4.6(c)
"Expiration Time"......................................................................                   4.6(c)
"Legal Holiday"........................................................................                  12.7
"Legend" ..............................................................................                   2.12
"NNM"..................................................................................                   4.6(d)
"Paying Agent".........................................................................                   2.3
"Payment Blockage Notice"..............................................................                   5.2
"Primary Registrar"....................................................................                   2.3
"Purchase Agreement"...................................................................                   2.1
"Purchased Shares".....................................................................                   4.6(c)
"QIB"..................................................................................                   2.1
"Registrar"............................................................................                   2.3
"Rights Plan" .........................................................................                   4.6(c)
"Triggering Distribution"..............................................................                   4.6(c)
"Trigger Event" .......................................................................                   4.6(c)
"Unissued Shares"......................................................................                   3.8(a)
</TABLE>

         SECTION 1.3.      TRUST INDENTURE ACT PROVISIONS.

         Whenever this Indenture refers to a provision of the TIA, that
provision is incorporated by reference in and made a part of this Indenture.
The Indenture shall also include those provisions of the

                                      7
<PAGE>

TIA required to be included herein by the provisions of the Trust Indenture
Reform Act of 1990. The following TIA terms used in this Indenture have the
following meanings:

         "indenture securities" means the Securities;

         "indenture security holder" means a Securityholder;

         "indenture to be qualified" means this Indenture;

         "indenture trustee" or "institutional trustee" means the Trustee; and
"obligor" on the indenture securities means the Company or any other obligor
on the Securities.

         All other terms used in this Indenture that are defined in the TIA,
defined by TIA reference to another statute or defined by any SEC rule and not
otherwise defined herein have the meanings assigned to them therein.

         SECTION 1.4.      RULES OF CONSTRUCTION.

         Unless the context otherwise requires:

               (A)      a term has the meaning assigned to it herein;

               (B)      an accounting term not otherwise defined has the
meaning assigned to it in accordance with GAAP;

               (C)      words in the singular include the plural, and words in
the plural include the singular;

               (D)      provisions apply to successive events and
transactions;

               (E)      the term "merger" includes a statutory share exchange
and the term "merged" has a correlative meaning;

               (F)      the masculine gender includes the feminine and the
neuter;

               (G)      references to agreements and other instruments include
subsequent amendments thereto; and

               (H)      "herein," "hereof" and other words of similar import
refer to this Indenture as a whole and not to any particular Article, Section
or other subdivision.

                                  ARTICLE 2
                                THE SECURITIES

         SECTION 2.1.      FORM AND DATING.

         The Securities and the Trustee's certificate of authentication shall
be substantially in the respective forms set forth in Exhibit A, which Exhibit
is incorporated in and made part of this Indenture. The Securities may have
notations, legends or endorsements required by law, stock exchange rule or
usage. The Company shall provide any such notations, legends or endorsements
to the Trustee in writing. Each Security shall be dated the date of its
authentication. The Securities are being offered and sold by the Company
pursuant to a Purchase Agreement, dated December 5, 2001 (the "Purchase
Agreement"),

                                      8
<PAGE>

between the Company and the Initial Purchasers, in transactions exempt from,
or not subject to, the registration requirements of the Securities Act.

        (a) Restricted Global Securities. All of the Securities are initially
being offered and sold to qualified institutional buyers as defined in Rule
144A (collectively, "QIBs" or individually, each a "QIB") in reliance on Rule
144A under the Securities Act and shall be issued initially in the form of one
or more Restricted Global Securities, which shall be deposited on behalf of
the purchasers of the Securities represented thereby with the Trustee, at its
Corporate Trust Office, as custodian for the depositary, The Depository Trust
Company ("DTC") (such depositary, or any successor thereto, being hereinafter
referred to as the "Depositary"), and registered in the name of its nominee,
Cede & Co., duly executed by the Company and authenticated by the Trustee as
hereinafter provided. The aggregate principal amount of the Restricted Global
Securities may from time to time be increased or decreased by adjustments made
on the records of the Securities Custodian as hereinafter provided, subject in
each case to compliance with the Applicable Procedures.

        (b) Global Securities In General. Each Global Security shall represent
such of the outstanding Securities as shall be specified therein and each
shall provide that it shall represent the aggregate amount of outstanding
Securities from time to time endorsed thereon and that the aggregate amount of
outstanding Securities represented thereby may from time to time be reduced or
increased, as appropriate, to reflect exchanges, redemptions, purchases or
conversions of such Securities. Any adjustment of the aggregate principal
amount of a Global Security to reflect the amount of any increase or decrease
in the amount of outstanding Securities represented thereby shall be made by
the Trustee in accordance with instructions given by the Holder thereof as
required by Section 2.12 hereof and shall be made on the records of the
Trustee and the Depositary.

         Members of, or participants in, the Depositary ("Agent Members")
shall have no rights under this Indenture with respect to any Global Security
held on their behalf by the Depositary or under the Global Security, and the
Depositary (including, for this purpose, its nominee) may be treated by the
Company, the Trustee and any agent of the Company or the Trustee as the
absolute owner and Holder of such Global Security for all purposes whatsoever.
Notwithstanding the foregoing, nothing herein shall (A) prevent the Company,
the Trustee or any agent of the Company or the Trustee from giving effect to
any written certification, proxy or other authorization furnished by the
Depositary or (B) impair, as between the Depositary and its Agent Members, the
operation of customary practices governing the exercise of the rights of a
Holder of any Security.

        (c) Book Entry Provisions. The Company shall execute and the Trustee
shall, in accordance with this Section 2.1(c), authenticate and deliver
initially one or more Global Securities that (i) shall be registered in the
name of Cede & Co. or as otherwise instructed by the Depositary, (ii) shall be
delivered by the Trustee to the Depositary or pursuant to the Depositary's
instructions and (iii) shall bear legends substantially to the following
effect:

"UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY TO CEPHALON, INC. (THE "COMPANY") OR ITS AGENT FOR
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS
REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY
AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT
HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER,
PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS
WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST
HEREIN. TRANSFERS OF THIS GLOBAL

                                      9
<PAGE>

SECURITY SHALL BE LIMITED TO TRANSFERS TO NOMINEES OF THE DEPOSITORY TRUST
COMPANY OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF
PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN
ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN ARTICLE TWO OF THE INDENTURE
REFERRED TO ON THE REVERSE HEREOF."

         SECTION 2.2.      EXECUTION AND AUTHENTICATION.

         An Officer shall sign the Securities for the Company by manual or
facsimile signature. Typographic and other minor errors or defects in any such
facsimile signature shall not affect the validity or enforceability of any
Security which has been authenticated and delivered by the Trustee.

         If an Officer whose signature is on a Security no longer holds that
office at the time the Trustee authenticates the Security, the Security shall
be valid nevertheless.

         A Security shall not be valid until an authorized signatory of the
Trustee manually signs the certificate of authentication on the Security. The
signature shall be conclusive evidence that the Security has been
authenticated under this Indenture.

         The Trustee shall authenticate and make available for delivery
Securities for original issue in the aggregate principal amount of up to
$600,000,000 upon receipt of a written order or orders of the Company signed
by two Officers of the Company (a "Company Order"). The Company Order shall
specify the amount of Securities to be authenticated, shall provide that all
such Securities will be represented by a Restricted Global Security and the
date on which each original issue of Securities is to be authenticated. The
aggregate principal amount of Securities outstanding at any time may not
exceed $600,000,000 except as provided in Section 2.7.

         The Trustee shall act as the initial authenticating agent.
Thereafter, the Trustee may appoint an authenticating agent acceptable to the
Company to authenticate Securities. An authenticating agent may authenticate
Securities whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent. An
authenticating agent shall have the same rights as an Agent to deal with the
Company or an Affiliate of the Company.

         The Securities shall be issuable only in registered form without
coupons and only in denominations of $1,000 principal amount and any integral
multiple thereof.

         SECTION 2.3.      REGISTRAR, PAYING AGENT AND CONVERSION AGENT.

         The Company shall maintain one or more offices or agencies where
Securities may be presented for registration of transfer or for exchange
(each, a "Registrar"), one or more offices or agencies where Securities may be
presented for payment (each, a "Paying Agent"), one or more offices or
agencies where Securities may be presented for conversion (each, a "Conversion
Agent") and one or more offices or agencies where notices and demands to or
upon the Company in respect of the Securities and this Indenture may be
served. The Company will at all times maintain a Paying Agent, Conversion
Agent, Registrar and an office or agency where notices and demands to or upon
the Company in respect of the Securities and this Indenture may be served in
the Borough of Manhattan, The City of New York. One of the Registrars (the
"Primary Registrar") shall keep a register of the Securities and of their
transfer and exchange.

         The Company shall enter into an appropriate agency agreement with any
Agent not a party to this Indenture. The agreement shall implement the
provisions of this Indenture that relate to such Agent. The

                                      10
<PAGE>

Company shall notify the Trustee of the name and address of any Agent not a
party to this Indenture. If the Company fails to maintain a Registrar, Paying
Agent, Conversion Agent or agent for service of notices and demands in any
place required by this Indenture, or fails to give the foregoing notice, the
Trustee shall act as such. The Company or any Affiliate of the Company may act
as Paying Agent (except for the purposes of Section 6.1 and Article 10).

         The Company hereby initially designates the Trustee as Paying Agent,
Registrar, Custodian and Conversion Agent, and each of the Corporate Trust
Office of the Trustee and the office or agency of the Trustee in the Borough
of Manhattan, The City of New York (which shall initially be State Street Bank
and Trust Company, N.A., an Affiliate of the Trustee, as agent of the Trustee
located at [61 Broadway, New York, New York 10006, Attention: Corporate Trust
Administration] (Cephalon, Inc. 2 1/2% Convertible Subordinated Notes due
December 15, 2006)), one such office or agency of the Company for each of the
aforesaid purposes.

         SECTION 2.4.      PAYING AGENT TO HOLD MONEY IN TRUST.

         Prior to 11:00 a.m., New York City time, on each due date of the
principal of or interest, if any, on any Securities, the Company shall deposit
with a Paying Agent a sum sufficient to pay such principal or interest, if
any, so becoming due. Subject to Section 5.2, a Paying Agent shall hold in
trust for the benefit of Securityholders or the Trustee all money held by the
Paying Agent for the payment of principal of or interest, if any, on the
Securities, and shall notify the Trustee of any default by the Company (or any
other obligor on the Securities) in making any such payment. If the Company or
an Affiliate of the Company acts as Paying Agent, it shall, before 11:00 a.m.,
New York City time, on each due date of the principal of or interest on any
Securities, segregate the money and hold it as a separate trust fund. The
Company at any time may require a Paying Agent to pay all money held by it to
the Trustee, and the Trustee may at any time during the continuance of any
default, upon written request to a Paying Agent, require such Paying Agent to
pay forthwith to the Trustee all sums so held in trust by such Paying Agent.
Upon doing so, the Paying Agent (other than the Company) shall have no further
liability for the money.

         SECTION 2.5.      SECURITYHOLDER LISTS.

         The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Securityholders. If the Trustee is not the Primary Registrar, the Company
shall furnish to the Trustee on or before each semiannual interest payment
date, and at such other times as the Trustee may request in writing, a list in
such form and as of such date as the Trustee may reasonably require of the
names and addresses of Securityholders.

         SECTION 2.6.      TRANSFER AND EXCHANGE.

         (a) Subject to compliance with any applicable additional requirements
contained in Section 2.12, when a Security is presented to a Registrar with a
request to register a transfer thereof or to exchange such Security for an
equal principal amount of Securities of other authorized denominations, the
Registrar shall register the transfer or make the exchange as requested;
provided, however, that every Security presented or surrendered for
registration of transfer or exchange shall be duly endorsed or accompanied by
an assignment form and, if applicable, a transfer certificate each in the form
included in Exhibit A, and in form satisfactory to the Registrar duly executed
by the Holder thereof or its attorney duly authorized in writing. To permit
registration of transfers and exchanges, upon surrender of any Security for
registration of transfer or exchange at an office or agency maintained
pursuant to Section 2.3, the Company shall execute and the Trustee shall
authenticate Securities of a like aggregate principal amount at the
Registrar's request. Any exchange or transfer shall be without charge, except
that the Company or the Registrar may require payment of a sum sufficient to
cover any tax or other governmental charge that

                                      11
<PAGE>

may be imposed in relation thereto; and provided, that this sentence shall not
apply to any exchange pursuant to Section 2.10, 2.12(a), 3.6, 3.11, 4.2 (last
paragraph) or 11.5.

         Neither the Company, any Registrar nor the Trustee shall be required
to exchange or register a transfer of (i) any Securities for a period of 15
days next preceding any mailing of a notice of Securities to be redeemed, (ii)
any Securities or portions thereof selected or called for redemption (except,
in the case of redemption of a Security in part, the portion thereof not to be
redeemed) or (iii) any Securities or portions thereof in respect of which a
Change in Control Purchase Notice has been delivered and not withdrawn by the
Holder thereof (except, in the case of the purchase of a Security in part, the
portion thereof not to be purchased).

         All Securities issued upon any transfer or exchange of Securities
shall be valid obligations of the Company, evidencing the same debt and
entitled to the same benefits under this Indenture, as the Securities
surrendered upon such transfer or exchange.

         (b) Any Registrar appointed pursuant to Section 2.3 hereof shall
provide to the Trustee such information as the Trustee may reasonably require
in connection with the delivery by such Registrar of Securities upon transfer
or exchange of Securities.

         (c) Each Holder of a Security agrees to indemnify the Company and the
Trustee against any liability that may result from the transfer, exchange or
assignment of such Holder's Security in violation of any provision of this
Indenture and/or applicable United States federal or state securities law.

         The Trustee shall have no obligation or duty to monitor, determine or
inquire as to compliance with any restrictions on transfer imposed under this
Indenture or under applicable law with respect to any transfer of any interest
in any Security (including any transfers between or among Agent Members or
other beneficial owners of interests in any Global Security) other than to
require delivery of such certificates and other documentation or evidence as
are expressly required by, and to do so if and when expressly required by the
terms of, this Indenture, and to examine the same to determine substantial
compliance as to form with the express requirements hereof.

         SECTION 2.7.      REPLACEMENT SECURITIES.

         If any mutilated Security is surrendered to the Company, a Registrar
or the Trustee, or the Company, a Registrar and the Trustee receive evidence
to their satisfaction of the destruction, loss or theft of any Security, and
there is delivered to the Company, the applicable Registrar and the Trustee
such security or indemnity as will be required by them to save each of them
harmless, then, in the absence of notice to the Company, such Registrar or the
Trustee that such Security has been acquired by a bona fide purchaser, the
Company shall execute, and upon its written request the Trustee shall
authenticate and deliver, in exchange for any such mutilated Security or in
lieu of any such destroyed, lost or stolen Security, a new Security of like
tenor and principal amount, bearing a number not contemporaneously
outstanding.

         In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, or is about to be redeemed or
purchased by the Company pursuant to Article 3, the Company in its discretion
may, instead of issuing a new Security, pay, redeem or purchase such Security,
as the case may be.

         Upon the issuance of any new Securities under this Section 2.7, the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in

                                      12
<PAGE>

relation thereto and any other reasonable expenses (including the reasonable
fees and expenses of the Trustee or the Registrar) in connection therewith.

         Every new Security issued pursuant to this Section 2.7 in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the
mutilated, destroyed, lost or stolen Security shall be at any time enforceable
by anyone, and shall be entitled to all benefits of this Indenture equally and
proportionately with any and all other Securities duly issued hereunder.

         The provisions of this Section 2.7 are (to the extent lawful)
exclusive and shall preclude (to the extent lawful) all other rights and
remedies with respect to the replacement or payment of mutilated, destroyed,
lost or stolen Securities.

         SECTION 2.8.      OUTSTANDING SECURITIES.

         Securities outstanding at any time are all Securities authenticated
by the Trustee, except for those canceled by it, those converted pursuant to
Article IV, those delivered to it for cancellation or surrendered for transfer
or exchange and those described in this Section 2.8 as not outstanding.

         If a Security is replaced pursuant to Section 2.7, it ceases to be
outstanding unless the Company receives, subsequent to the new Security's
authentication, proof satisfactory to the Company that the replaced Security
is held by a bona fide purchaser.

         If a Paying Agent (other than the Company or an Affiliate of the
Company) holds on a Redemption Date, a Change in Control Purchase Date or the
Final Maturity Date money sufficient to pay the principal of (including
premium, if any) and accrued interest on Securities (or portions thereof)
payable on that date, then on and after such Redemption Date, Change in
Control Purchase Date or the final Maturity Date, as the case may be, such
Securities (or portions thereof, as the case may be) shall cease to be
outstanding and interest on them shall cease to accrue; provided, that if such
Securities are to be redeemed, notice of such redemption has been duly given
pursuant to this Indenture or provision therefore satisfactory to the Trustee
has been made.

         Subject to the restrictions contained in Section 2.9, a Security does
not cease to be outstanding because the Company or an Affiliate of the Company
holds the Security.

         SECTION 2.9.      TREASURY SECURITIES.

         In determining whether the Holders of the required principal amount
of Securities have concurred in any notice, direction, waiver or consent,
Securities owned by the Company or any other obligor on the Securities or by
any Affiliate of the Company or of such other obligor shall be disregarded,
except that, for purposes of determining whether the Trustee shall be
protected in relying on any such notice, direction, waiver or consent, only
Securities which a Trust Officer of the Trustee actually knows are so owned
shall be so disregarded. Securities so owned which have been pledged in good
faith shall not be disregarded if the pledgee establishes to the satisfaction
of the Trustee the pledgee's right so to act with respect to the Securities
and that the pledgee is not the Company or any other obligor on the Securities
or any Affiliate of the Company or of such other obligor.

         SECTION 2.10.     TEMPORARY SECURITIES.

         Until definitive Securities are ready for delivery, the Company may
prepare and execute, and, upon receipt of a Company Order, the Trustee shall
authenticate and deliver, temporary Securities.

                                      13
<PAGE>

Temporary Securities shall be substantially in the form of definitive
Securities but may have variations that the Company with the consent of the
Trustee considers appropriate for temporary Securities. Without unreasonable
delay, the Company shall prepare and the Trustee shall authenticate and
deliver definitive Securities in exchange for temporary Securities.

         SECTION 2.11.     CANCELLATION.

         The Company at any time may deliver Securities to the Trustee for
cancellation. The Registrar, the Paying Agent and the Conversion Agent shall
forward to the Trustee or its agent any Securities surrendered to them for
transfer, exchange, redemption, payment or conversion. The Trustee and no one
else shall cancel, in accordance with its standard procedures, all Securities
surrendered for transfer, exchange, redemption, payment, conversion or
cancellation and shall deliver the canceled Securities to the Company. All
Securities which are redeemed, purchased or otherwise acquired by the Company
or any of its Subsidiaries prior to the Final Maturity Date shall be delivered
to the Trustee for cancellation, and the Company may not hold or resell such
Securities or issue any new Securities to replace any such Securities or any
Securities that any Holder has converted pursuant to Article 4. Without
limitation to the foregoing, any Securities acquired by any investment bankers
or other purchasers pursuant to Section 3.7 shall be surrendered for
conversion and thereafter cancelled, and may not be reoffered, sold or
otherwise transferred.

         SECTION 2.12.     LEGEND; ADDITIONAL TRANSFER AND EXCHANGE
                           REQUIREMENTS.

         (a) If Securities are issued upon the transfer, exchange or
replacement of Securities subject to restrictions on transfer and bearing the
legends set forth on the forms of Securities attached hereto as Exhibit A
(collectively, the "Legend"), or if a request is made to remove the Legend on
a Security, the Securities so issued shall bear the Legend, or the Legend
shall not be removed, as the case may be, unless there is delivered to the
Company and the Registrar such satisfactory evidence, which shall include an
opinion of counsel if requested by the Company or such Registrar, as may be
reasonably required by the Company and the Registrar, that neither the Legend
nor the restrictions on transfer set forth therein are required to ensure that
transfers thereof comply with the provisions of Rule 144A or Rule 144 under
the Securities Act or that such Securities are not "restricted" within the
meaning of Rule 144 under the Securities Act; provided that no such evidence
need be supplied in connection with the sale of such Security pursuant to a
registration statement that is effective at the time of such sale. Upon (i)
provision of such satisfactory evidence if requested, or (ii) notification by
the Company to the Trustee and Registrar of the sale of such Security pursuant
to a registration statement that is effective at the time of such sale, the
Trustee, at the written direction of the Company, shall authenticate and
deliver a Security that does not bear the Legend. If the Legend is removed
from the face of a Security and the Security is subsequently held by an
Affiliate of the Company, the Legend shall be reinstated.

         (b) A Global Security may not be transferred, in whole or in part, to
any Person other than the Depositary or a nominee or any successor thereof,
and no such transfer to any such other Person may be registered; provided that
the foregoing shall not prohibit any transfer of a Security that is issued in
exchange for a Global Security but is not itself a Global Security. No
transfer of a Security to any Person shall be effective under this Indenture
or the Securities unless and until such Security has been registered in the
name of such Person. Notwithstanding any other provisions of this Indenture or
the Securities, transfers of a Global Security, in whole or in part, shall be
made only in accordance with this Section 2.12.

         (c) Subject to the succeeding paragraph, every Security shall be
subject to the restrictions on transfer provided in the Legend other than a
Restricted Global Security. Whenever any Restricted

                                      14
<PAGE>

Security other than a Restricted Global Security is presented or surrendered
for registration of transfer or for exchange for a Security registered in a
name other than that of the Holder, such Security must be accompanied by a
certificate in substantially the form set forth in Exhibit B, dated the date
of such surrender and signed by the Holder of such Security, as to compliance
with such restrictions on transfer. The Registrar shall not be required to
accept for such registration of transfer or exchange any Security not so
accompanied by a properly completed certificate.

         (d) The restrictions imposed by the Legend upon the transferability
of any Security shall cease and terminate when such Security has been sold
pursuant to an effective registration statement under the Securities Act or
transferred in compliance with Rule 144 under the Securities Act (or any
successor provision thereto) or, if earlier, upon the expiration of the
holding period applicable to sales thereof under Rule 144(k) under the
Securities Act (or any successor provision). Any Security as to which such
restrictions on transfer shall have expired in accordance with their terms or
shall have terminated may, upon a surrender of such Security for exchange to
the Registrar in accordance with the provisions of this Section 2.12
(accompanied, in the event that such restrictions on transfer have terminated
by reason of a transfer in compliance with Rule 144 or any successor
provision, by, if requested, an opinion of counsel reasonably acceptable to
the Company, addressed to the Company and in form acceptable to the Company,
to the effect that the transfer of such Security has been made in compliance
with Rule 144 or such successor provision), be exchanged for a new Security,
of like tenor and aggregate principal amount, which shall not bear the
restrictive Legend. The Company shall inform the Trustee of the effective date
of any registration statement registering the Securities under the Securities
Act. The Trustee shall not be liable for any action taken or omitted to be
taken by it in good faith in accordance with the aforementioned opinion of
counsel or registration statement.

         (e) As used in the preceding two paragraphs of this Section 2.12, the
term "transfer" encompasses any sale, pledge, transfer, hypothecation or other
disposition of any Security.

         (f) The provisions of clauses (i), (ii), (iii) and (iv) below shall
apply only to Global Securities:

                      (i)      Notwithstanding any other provisions of this
                  Indenture or the Securities, a Global Security shall not be
                  exchanged in whole or in part for a Security registered in
                  the name of any Person other than the Depositary or one or
                  more nominees thereof; provided that a Global Security may
                  be exchanged for Securities registered in the names of any
                  person designated by the Depositary in the event that (A)
                  the Depositary has notified the Company that it is unwilling
                  or unable to continue as Depositary for such Global Security
                  or such Depositary has ceased to be a "clearing agency"
                  registered under the Exchange Act, and a successor
                  Depositary is not appointed by the Company within 90 days,
                  (B) the Company has provided the Depositary with written
                  notice that it has decided to discontinue use of the system
                  of book-entry transfer through the Depositary or any
                  successor Depositary or (C) an Event of Default has occurred
                  and is continuing with respect to the Securities.  Any
                  Global Security exchanged pursuant to clauses (A) or (B)
                  above shall be so exchanged in whole and not in part, and
                  any Global Security exchanged pursuant to clause (C) above
                  may be exchanged in whole or from time to time in part as
                  directed by the Depositary.  Any Security issued in exchange
                  for a Global Security or any portion thereof shall be a
                  Global Security; provided that any such Security so issued
                  that is registered in the name of a Person other than the
                  Depositary or a nominee thereof shall not be a Global
                  Security.

                      (ii)     Securities issued in exchange for a Global
                  Security or any portion thereof shall be issued in
                  definitive, fully registered form, without interest coupons,
                  shall have an aggregate principal amount equal to that of
                  such Global Security or portion thereof to be

                                      15
<PAGE>

                  so exchanged, shall be registered in such names and be in
                  such authorized denominations as the Depositary shall
                  designate and shall bear the applicable legends provided for
                  herein.  Any Global Security to be exchanged in whole shall
                  be surrendered by the Depositary to the Trustee, as
                  Registrar.  With regard to any Global Security to be
                  exchanged in part, either such Global Security shall be so
                  surrendered for exchange or, if the Trustee is acting as
                  custodian for the Depositary or its nominee with respect to
                  such Global Security, the principal amount thereof shall be
                  reduced, by an amount equal to the portion thereof to be so
                  exchanged, by means of an appropriate adjustment made on the
                  records of the Trustee. Upon any such surrender or
                  adjustment, the Trustee shall authenticate and deliver the
                  Security issuable on such exchange to or upon the order of
                  the Depositary or an authorized representative thereof.

                      (iii)    Subject to the provisions of clause (v) below,
                  the registered Holder may grant proxies and otherwise
                  authorize any Person, including Agent Members and persons
                  that may hold interests through Agent Members, to take any
                  action which a Holder is entitled to take under this
                  Indenture or the Securities.

                      (iv)     In the event of the occurrence of any of the
                  events specified in clause (i) above, the Company will
                  promptly make available to the Trustee a reasonable supply
                  of Certificated Securities in definitive, fully registered
                  form, without interest coupons.

         SECTION 2.13.     CUSIP NUMBERS.

         The Company in issuing the Securities may use one or more "CUSIP"
numbers (if then generally in use), and, if so, the Trustee shall use "CUSIP"
numbers in notices of redemption or purchase as a convenience to Holders;
provided that any such notice may state that no representation is made as to
the correctness of such numbers either as printed on the Securities or as
contained in any notice of a redemption or purchase and that reliance may be
placed only on the other identification numbers printed on the Securities, and
any such redemption or purchase shall not be affected by any defect in or
omission of such numbers. The Company will promptly notify the Trustee of any
change in the "CUSIP" numbers.

                                  ARTICLE 3
                           REDEMPTION AND PURCHASES

         SECTION 3.1.      RIGHT TO REDEEM; NOTICE TO TRUSTEE.

         The Securities may be redeemed at the election of the Company, as a
whole or from time to time in part, at any time on or after December 20, 2004,
at the Redemption Prices specified in paragraph 5 of the form of Security
attached hereto as Exhibit A, together with accrued interest up to, but not
including, the Redemption Date; provided that if the Redemption Date falls
after an interest payment record date and on or before an interest payment
date, then the interest will be payable to the Holders in whose name the
Securities are registered at the close of business on the interest payment
record date.

         If the Company elects to redeem Securities pursuant to this Section
3.1 and paragraph 5 of the Securities, it shall notify the Trustee at least 25
days prior to the Redemption Date as fixed by the Company (unless a shorter
notice shall be satisfactory to the Trustee) of the Redemption Date and the
principal amount of Securities to be redeemed. If fewer than all of the
Securities are to be redeemed, the record date relating to such redemption
shall be selected by the Company and given to the Trustee, which record date
shall not be less than ten days after the date of notice to the Trustee.

                                      16
<PAGE>

         SECTION 3.2.      SELECTION OF SECURITIES TO BE REDEEMED.

         If less than all of the Securities are to be redeemed, unless the
procedures of the Depositary provide otherwise, the Trustee shall, at least 20
days but not more than 60 days prior to the Redemption Date, select the
Securities to be redeemed. The Trustee shall make the selection from the
Securities outstanding and not previously called for redemption, by lot, or in
its discretion, on a pro rata basis. Securities in denominations of $1,000 may
only be redeemed in whole. The Trustee may select for redemption portions
(equal to $1,000 or any integral multiple thereof) of the principal of
Securities that have denominations larger than $1,000. Provisions of this
Indenture that apply to Securities called for redemption also apply to
portions of Securities called for redemption.

         If any Security selected for partial redemption is converted in part
before termination of the conversion right with respect to the portion of the
Security so selected, the converted portion of such Security shall be deemed
to be the portion selected for redemption. Securities which have been
converted subsequent to the Trustee commencing selection of Securities to be
redeemed but prior to redemption of such Securities shall be treated by the
Trustee as outstanding for the purpose of such selection.

         SECTION 3.3.      NOTICE OF REDEMPTION.

         At least 20 days but not more than 60 days before a Redemption Date,
the Company shall mail or cause to be mailed a notice of redemption to each
Holder of Securities to be redeemed at such Holder's address as it appears on
the Primary Registrar's books.

         The notice shall identify the Securities (including CUSIP numbers) to
be redeemed and shall state:

               (1)      the Redemption Date;

               (2)      the Redemption Price;

               (3)      the then current Conversion Price;

               (4)      the name and address of each Paying Agent and
Conversion Agent;

               (5)      that Securities called for redemption must be
presented and surrendered to a Paying Agent to collect the Redemption Price;

               (6)      that Holders who wish to convert Securities must
surrender such Securities for conversion no later than the close of business
on the Business Day immediately preceding the Redemption Date and must satisfy
the other requirements set forth in paragraph 8 of the Securities;

               (7)      that, unless the Company defaults in making the
payment of the Redemption Price, interest on Securities called for redemption
shall cease accruing on and after the Redemption Date and the only remaining
right of the Holder shall be to receive payment of the Redemption Price plus
accrued interest, if any upon presentation and surrender to a Paying Agent of
the Securities; and

               (8)       if any Security is being redeemed in part, the
portion of the principal amount of such Security to be redeemed and that,
after the Redemption Date, upon presentation and surrender of such Security, a
new Security or Securities in aggregate principal amount equal to the
unredeemed portion thereof will be issued.

                                      17
<PAGE>

         If any of the Securities to be redeemed is in the form of a Global
Security, then the Company shall modify such notice to the extent necessary to
accord with the procedures of the Depositary applicable to redemptions. At the
Company's written request, which request shall (i) be irrevocable once given
and (ii) set forth all relevant information required by clauses (1) through
(8) of the preceding paragraph, the Trustee shall give the notice of
redemption to each Holder in the Company's name and at the Company's expense.

         SECTION 3.4.      EFFECT OF NOTICE OF REDEMPTION.

         Once notice of redemption is mailed, Securities called for redemption
become due and payable on the Redemption Date and at the Redemption Price
stated in the notice, together with accrued interest, if any, except for
Securities that are converted in accordance with the provisions of Article 4.
On or after the Redemption Date and upon presentation and surrender to a
Paying Agent, Securities called for redemption shall be paid at the Redemption
Price, plus accrued interest up to but not including the Redemption Date;
provided that if the Redemption Date is an interest payment date, interest
will be payable to the Holders in whose names the Securities are registered on
the Redemption Date.

         SECTION 3.5.      DEPOSIT OF REDEMPTION PRICE.

         Prior to 11:00 a.m. New York City time, on the Redemption Date, the
Company shall deposit with a Paying Agent (or, if the Company acts as Paying
Agent, shall segregate and hold in trust) an amount of money (in immediately
available funds if deposited on such Redemption Date) sufficient to pay the
Redemption Price of and accrued interest on all Securities to be redeemed on
that date, other than Securities or portions thereof called for redemption on
that date which have been delivered by the Company to the Trustee for
cancellation or have been converted. The Paying Agent shall as promptly as
practicable return to the Company any money not required for that purpose
because of the conversion of Securities pursuant to Article 4 or, if such
money is then held by the Company in trust and is not required for such
purpose, it shall be discharged from the trust.

         SECTION 3.6.      SECURITIES REDEEMED IN PART.

         Upon presentation and surrender of a Security that is redeemed in
part, the Company shall execute and the Trustee shall authenticate and deliver
to the Holder a new Security equal in principal amount to the unredeemed
portion of the Security surrendered.

         SECTION 3.7.      CONVERSION ARRANGEMENT ON CALL FOR REDEMPTION.

         In connection with any redemption of Securities, the Company may
arrange for the purchase and conversion of any Securities called for
redemption by an agreement with one or more investment bankers or other
purchasers to purchase such Securities by paying to a Paying Agent (other than
the Company or any of its Affiliates) in trust for the Holders, on or before
11:00 a.m. New York City time on the Redemption Date, an amount that, together
with any amounts deposited with such Paying Agent by the Company for the
redemption of such Securities, is not less than the Redemption Price, together
with interest accrued to, but not including, the Redemption Date, of such
Securities. Notwithstanding anything to the contrary contained in this Article
3, the obligation of the Company to pay the Redemption Price of such
Securities, including all accrued interest, shall be deemed to be satisfied
and discharged to the extent such amount is so paid by such purchasers;
provided, however, that nothing in this Section 3.7 shall relieve the Company
of its obligation to pay the Redemption Price, plus accrued interest to but
excluding the relevant Redemption Date, on Securities called for redemption.
If such an agreement with one or more investment banks or other purchasers is
entered into, any Securities called for redemption and not surrendered for
conversion by the Holders thereof prior to the relevant Redemption Date may,
at the

                                      18
<PAGE>

option of the Company upon written notice to the Trustee, be deemed, to the
fullest extent permitted by law, acquired by such purchasers from such Holders
and (notwithstanding anything to the contrary contained in Article 4)
surrendered by such purchasers for conversion, all as of 11:00 a.m. New York
City time on the Redemption Date, subject to payment of the above amount as
aforesaid. The Paying Agent shall hold and pay to the Holders whose Securities
are selected for redemption any such amount paid to it for purchase in the
same manner as it would money deposited with it by the Company for the
redemption of Securities. Without the Paying Agent's prior written consent, no
arrangement between the Company and such purchasers for the purchase and
conversion of any Securities shall increase or otherwise affect any of the
powers, duties, responsibilities or obligations of the Paying Agent as set
forth in this Indenture, and the Company agrees to indemnify the Paying Agent
from, and hold it harmless against, any loss, liability or expense arising out
of or in connection with any such arrangement for the purchase and conversion
of any Securities between the Company and such purchasers, including the costs
and expenses incurred by the Paying Agent in the defense of any claim or
liability arising out of or in connection with the exercise or performance of
any of its powers, duties, responsibilities or obligations under this
Indenture.

         SECTION 3.8.      PURCHASE OF SECURITIES AT OPTION OF THE HOLDER UPON
                           CHANGE IN CONTROL.

         (a) If at any time that Securities remain outstanding there shall
occur a Change in Control, Securities shall be purchased by the Company at the
option of the Holders, as of the date that is 30 Business Days after the
occurrence of the Change in Control (the "Change in Control Purchase Date") at
a purchase price equal to 100% of the principal amount of the Securities,
together with accrued and unpaid interest to, but excluding, the Change in
Control Purchase Date (the "Change in Control Purchase Price"), subject to
satisfaction by or on behalf of any Holder of the requirements set forth in
subsection (c) of this Section 3.8.

         A "Change in Control" shall be deemed to have occurred if any of the
following occurs after the date hereof:

               (1) any "person" or "group" (as such terms are defined below)
is or becomes the "beneficial owner" (as defined below), directly or
indirectly, of shares of Voting Stock of the Company representing 50% or more
of the total voting power of all outstanding classes of Voting Stock of the
Company or has the power, directly or indirectly, to elect a majority of the
members of the Board of Directors of the Company; or

               (2) the Company consolidates with, or merges with or into,
another Person or the Company sells, assigns, conveys, transfers, leases or
otherwise disposes of all or substantially all of the assets of the Company,
or any Person consolidates with, or merges with or into, the Company, in any
such event other than pursuant to a transaction in which the Persons that
"beneficially owned" (as defined below), directly or indirectly, shares of
Voting Stock of the Company immediately prior to such transaction
"beneficially own" (as defined below), directly or indirectly, shares of
Voting Stock of the Company representing at least a majority of the total
voting power of all outstanding classes of Voting Stock of the surviving or
transferee Person; or

               (3) the holders of capital stock of the Company approve any
plan or proposal for the liquidation or dissolution of the Company (whether or
not otherwise in compliance with the terms hereof).

For the purpose of the definition of "Change in Control", (i) "person" and
"group" have the meanings given such terms under Section 13(d) and 14(d) of
the Exchange Act or any successor provision to either

                                      19
<PAGE>

of the foregoing, and the term "group" includes any group acting for the
purpose of acquiring, holding or disposing of securities within the meaning of
Rule 13d-5(b)(1) under the Exchange Act (or any successor provision thereto),
(ii) a "beneficial owner" shall be determined in accordance with Rule 13d-3
under the Exchange Act, as in effect on the date of this Indenture, except
that the number of shares of Voting Stock of the Company shall be deemed to
include, in addition to all outstanding shares of Voting Stock of the Company
and Unissued Shares deemed to be held by the "person" or "group" (as such
terms are defined above) or other Person with respect to which the Change in
Control determination is being made, all Unissued Shares deemed to be held by
all other Persons, and (iii) the terms "beneficially owned" and "beneficially
own" shall have meanings correlative to that of "beneficial owner". The term
"Unissued Shares" means shares of Voting Stock not outstanding that are
subject to options, warrants, rights to purchase or conversion privileges
exercisable within 60 days of the date of determination of a Change in
Control.

         Notwithstanding anything to the contrary set forth in this Section
3.8, a Change in Control will not be deemed to have occurred if either:

               (1)      the Closing Price (determined in accordance with Section
4.6(d) of this Indenture) of the Common Stock for any five Trading Days during
the ten Trading Days immediately preceding the Change in Control is at least
equal to 105% of the Conversion Price in effect on such Trading Day; or

               (2)      in the case of a merger or consolidation, all of the
consideration (excluding cash payments for fractional shares and cash payments
pursuant to dissenters' appraisal rights) in the merger or consolidation
constituting the Change in Control consists of common stock traded on a United
States national securities exchange or quoted on the Nasdaq National Market
(or which will be so traded or quoted when issued or exchanged in connection
with such Change in Control) and as a result of such transaction or
transactions the Securities become convertible solely into such common stock.

        (b) Within 10 Business Days after the occurrence of a Change in
Control, the Company shall mail a written notice of the Change in Control to
the Trustee and to each Holder (and to beneficial owners as required by
applicable law). The notice shall include the form of a Change in Control
Purchase Notice to be completed by the Holder and shall state:

               (1)      the date of such Change in Control and, briefly, the
events causing such Change in Control;

               (2)      the date by which the Change in Control Purchase
Notice pursuant to this Section 3.8 must be given;

               (3)      the Change in Control Purchase Date;

               (4)      the Change in Control Purchase Price;

               (5)      the Holder's right to require the Company to purchase
the Securities;

               (6)      briefly, the conversion rights of the Securities;

               (7)      the name and address of each Paying Agent and
Conversion Agent;

               (8)      the Conversion Price and any adjustments thereto;

                                      20
<PAGE>

               (9)      that Securities as to which a Change in Control
Purchase Notice has been given may be converted into Common Stock pursuant to
Article 4 of this Indenture only to the extent that the Change in Control
Purchase Notice has been withdrawn in accordance with the terms of this
Indenture;

               (10)     the procedures that the Holder must follow to exercise
rights under this Section 3.8;

               (11)     the procedures for withdrawing a Change in Control
Purchase Notice, including a form of notice of withdrawal; and

               (12)     that the Holder must satisfy the requirements set
forth in the Securities in order to convert the Securities.

         If any of the Securities is in the form of a Global Security, then
the Company shall modify such notice to the extent necessary to accord with
the procedures of the Depositary applicable to the repurchase of Global
Securities.

         (c) A Holder may exercise its rights specified in subsection (a) of
this Section 3.8 upon delivery of a written notice (which shall be in
substantially the form included in Exhibit A hereto and which may be delivered
by letter, overnight courier, hand delivery, facsimile transmission or in any
other written form and, in the case of Global Securities, may be delivered
electronically or by other means in accordance with the Depositary's customary
procedures) of the exercise of such rights (a "Change in Control Purchase
Notice") to any Paying Agent at any time prior to the close of business on the
Business Day next preceding the Change in Control Purchase Date.

         The delivery of such Security to any Paying Agent (together with all
necessary endorsements) at the office of such Paying Agent shall be a
condition to the receipt by the Holder of the Change in Control Purchase Price
therefor.

         The Company shall purchase from the Holder thereof, pursuant to this
Section 3.8, a portion of a Security if the principal amount of such portion
is $1,000 or an integral multiple of $1,000. Provisions of the Indenture that
apply to the purchase of all of a Security pursuant to Sections 3.8 through
3.13 also apply to the purchase of such portion of such Security.

         Notwithstanding anything herein to the contrary, any Holder
delivering to a Paying Agent the Change in Control Purchase Notice
contemplated by this subsection (c) shall have the right to withdraw such
Change in Control Purchase Notice in whole or in a portion thereof that is a
principal amount of $1,000 or in an integral multiple thereof at any time
prior to the close of business on the Business Day next preceding the Change
in Control Purchase Date by delivery of a written notice of withdrawal to the
Paying Agent in accordance with Section 3.9.

         A Paying Agent shall promptly notify the Company of the receipt by it
of any Change in Control Purchase Notice or written withdrawal thereof.

         Anything herein to the contrary notwithstanding, in the case of
Global Securities, any Change in Control Purchase Notice may be delivered or
withdrawn and such Securities may be surrendered or delivered for purchase in
accordance with the Applicable Procedures as in effect from time to time.

                                      21

<PAGE>

        SECTION 3.9. EFFECT OF CHANGE IN CONTROL PURCHASE NOTICE.

        Upon receipt by any Paying Agent of the Change in Control Purchase
Notice specified in Section 3.8(c), the Holder of the Security in respect of
which such Change in Control Purchase Notice was given shall (unless such Change
in Control Purchase Notice is withdrawn as specified below) thereafter be
entitled to receive the Change in Control Purchase Price with respect to such
Security. Such Change in Control Purchase Price shall be paid to such Holder
promptly following the later of (a) the Change in Control Purchase Date with
respect to such Security (provided the conditions in Section 3.8(c) have been
satisfied) and (b) the time of delivery of such Security to a Paying Agent by
the Holder thereof in the manner required by Section 3.8(c). Securities in
respect of which a Change in Control Purchase Notice has been given by the
Holder thereof may not be converted into shares of Common Stock pursuant to
Article 4 on or after the date of the delivery of such Change in Control
Purchase Notice unless such Change in Control Purchase Notice has first been
validly withdrawn.

        A Change in Control Purchase Notice may be withdrawn by means of a
written notice (which may be delivered by mail, overnight courier, hand
delivery, facsimile transmission or in any other written form and, in the case
of Global Securities, may be delivered electronically or by other means in
accordance with the Depositary's customary procedures) of withdrawal delivered
by the Holder to a Paying Agent at any time prior to the close of business on
the Business Day immediately preceding the Change in Control Purchase Date,
specifying the principal amount of the Security or portion thereof (which must
be a principal amount of $1,000 or an integral multiple of $1,000 in excess
thereof) with respect to which such notice of withdrawal is being submitted.

        SECTION 3.10. DEPOSIT OF CHANGE IN CONTROL PURCHASE PRICE.

        On or before 11:00 a.m. New York City time on the Change in Control
Purchase Date, the Company shall deposit with the Trustee or with a Paying Agent
(other than the Company or an Affiliate of the Company) an amount of money (in
immediately available funds if deposited on such Change in Control Purchase
Date) sufficient to pay the aggregate Change in Control Purchase Price of all
the Securities or portions thereof that are to be purchased as of such Change in
Control Purchase Date. The manner in which the deposit required by this Section
3.10 is made by the Company shall be at the option of the Company; provided that
such deposit shall be made in a manner such that the Trustee or a Paying Agent
shall have immediately available funds on the Change in Control Purchase Date.

         If a Paying Agent holds, in accordance with the terms hereof, money
sufficient to pay the Change in Control Purchase Price of any Security for which
a Change in Control Purchase Notice has been tendered and not withdrawn in
accordance with this Indenture then, on the Change in Control Purchase Date,
such Security will cease to be outstanding and the rights of the Holder in
respect thereof shall terminate (other than the right to receive the Change in
Control Purchase Price as aforesaid). The Company shall publicly announce the
principal amount of Securities purchased as a result of such Change in Control
on or as soon as practicable after the Change in Control Purchase Date.

        SECTION 3.11. SECURITIES PURCHASED IN PART.

        Any Security that is to be purchased only in part shall be surrendered
at the office of a Paying Agent, and promptly after the Change in Control
Purchase Date the Company shall execute and the Trustee shall authenticate and
deliver to the Holder of such Security, without service charge, a new Security
or Securities, of such authorized denomination or denominations as may be
requested by such Holder, in aggregate principal amount equal to, and in
exchange for, the portion of the principal amount of the Security so surrendered
that is not purchased.

                                       22
<PAGE>

        SECTION 3.12. COMPLIANCE WITH SECURITIES LAWS UPON PURCHASE OF
                      SECURITIES.

        In connection with any offer to purchase or purchase of Securities under
Section 3.8, the Company shall (a) comply with Rule 13e-4 and Rule 14e-1 (or any
successor to either such Rule), if applicable, under the Exchange Act, (b) file
the related Schedule TO (or any successor or similar schedule, form or report)
if required under the Exchange Act, and (c) otherwise comply with all federal
and state securities laws in connection with such offer to purchase or purchase
of Securities, all so as to permit the rights of the Holders and obligations of
the Company under Sections 3.8 through 3.11 to be exercised in the time and in
the manner specified therein.

        SECTION 3.13. REPAYMENT TO THE COMPANY.

        To the extent that the aggregate amount of cash deposited by the Company
pursuant to Section 3.10 exceeds the aggregate Change in Control Purchase Price
together with interest, if any, thereon of the Securities or portions thereof
that the Company is obligated to purchase, then promptly after the Change in
Control Purchase Date the Trustee or a Paying Agent, as the case may be, shall
return any such excess cash to the Company.

                                   ARTICLE 4
                                   CONVERSION

        SECTION 4.1. CONVERSION PRIVILEGE.

        Subject to the further provisions of this Article 4 and paragraph 8 of
the Securities, a Holder of a Security may convert the principal amount of such
Security (or any portion thereof equal to $1,000 or any integral multiple of
$1,000 in excess thereof) into Common Stock at any time prior to the close of
business on the Final Maturity Date, at the Conversion Price then in effect;
provided, however, that, if such Security is called for redemption or submitted
or presented for purchase pursuant to Article 3, such conversion right shall
terminate at the close of business on the Business Day immediately preceding the
Redemption Date or Change in Control Purchase Date, as the case may be, for such
Security or such earlier date as the Holder presents such Security for
redemption or for purchase (unless the Company shall default in making the
redemption payment or Change in Control Purchase Price payment when due, in
which case the conversion right shall terminate at the close of business on the
date such default is cured and such Security is redeemed or purchased, as the
case may be). The number of shares of Common Stock issuable upon conversion of a
Security shall be determined by dividing the principal amount of the Security or
portion thereof surrendered for conversion by the Conversion Price in effect on
the Conversion Date. The initial Conversion Price is set forth in paragraph 8 of
the Securities and is subject to adjustment as provided in this Article 4.

        Provisions of this Indenture that apply to conversion of all of a
Security also apply to conversion of a portion of a Security.

        A Security in respect of which a Holder has delivered a Change in
Control Purchase Notice pursuant to Section 3.8(c) exercising the option of such
Holder to require the Company to purchase such Security may be converted only if
such Change in Control Purchase Notice is withdrawn by a written notice of
withdrawal delivered to a Paying Agent prior to the close of business on the
Business Day immediately preceding the Change in Control Purchase Date in
accordance with Section 3.9.

                                       23
<PAGE>

        A Holder of Securities is not entitled to any rights of a holder of
Common Stock until such Holder has converted its Securities to Common Stock, and
only to the extent such Securities are deemed to have been converted into Common
Stock pursuant to this Article 4.

        SECTION 4.2. CONVERSION PROCEDURE.

        To convert a Security, a Holder must (a) complete and manually sign the
conversion notice on the back of the Security and deliver such notice to a
Conversion Agent, (b) surrender the Security to a Conversion Agent, (c) furnish
appropriate endorsements and transfer documents if required by a Registrar or a
Conversion Agent, and (d) pay any transfer or similar tax, if required. The date
on which the Holder satisfies all of those requirements is the "Conversion
Date." As soon as practicable after the Conversion Date, the Company shall
deliver to the Holder through a Conversion Agent a certificate for the number of
whole shares of Common Stock issuable upon the conversion and cash in lieu of
any fractional shares pursuant to Section 4.3. Anything herein to the contrary
notwithstanding, in the case of Global Securities, conversion notices may be
delivered and such Securities may be surrendered for conversion in accordance
with the Applicable Procedures as in effect from time to time.

        The person in whose name the Common Stock certificate is registered
shall be deemed to be a stockholder of record on the Conversion Date; provided,
however, that no surrender of a Security on any date when the stock transfer
books of the Company shall be closed shall be effective to constitute the person
or persons entitled to receive the shares of Common Stock upon such conversion
as the record holder or holders of such shares of Common Stock on such date, but
such surrender shall be effective to constitute the person or persons entitled
to receive such shares of Common Stock as the record holder or holders thereof
for all purposes at the close of business on the next succeeding day on which
such stock transfer books are open; provided, further, that such conversion
shall be at the Conversion Price in effect on the Conversion Date as if the
stock transfer books of the Company had not been closed. Upon conversion of a
Security, such person shall no longer be a Holder of such Security. No payment
or adjustment will be made for dividends or distributions on shares of Common
Stock issued upon conversion of a Security.

        Securities so surrendered for conversion (in whole or in part) during
the period from the close of business on any regular record date to the opening
of business on the next succeeding interest payment date (excluding Securities
or portions thereof called for redemption or presented for purchase upon a
Change in Control on a Redemption Date or Change in Control Purchase Date, as
the case may be, during the period beginning at the close of business on a
regular record date and ending at the opening of business on the first Business
Day after the next succeeding interest payment date, or if such interest payment
date is not a Business Day, the second such Business Day) shall also be
accompanied by payment in funds acceptable to the Company of an amount equal to
the interest payable on such interest payment date on the principal amount of
such Security then being converted, and such interest shall be payable to such
registered Holder notwithstanding the conversion of such Security, subject to
the provisions of this Indenture relating to the payment of defaulted interest
by the Company. Except as otherwise provided in this Section 4.2, no payment or
adjustment will be made for accrued interest on a converted Security. If the
Company defaults in the payment of interest payable on such interest payment
date, the Company shall promptly repay such funds to such Holder.

        Nothing in this Section shall affect the right of a Holder in whose name
any Security is registered at the close of business on a record date to receive
the interest payable on such Security on the related interest payment date in
accordance with the terms of this Indenture and the Securities. If a Holder
converts more than one Security at the same time, the number of shares of Common
Stock issuable upon the conversion shall be based on the aggregate principal
amount of Securities converted.

                                       24
<PAGE>

        Upon surrender of a Security that is converted in part, the Company
shall execute, and the Trustee shall authenticate and deliver to the Holder, a
new Security equal in principal amount to the unconverted portion of the
Security surrendered.

        SECTION 4.3. FRACTIONAL SHARES.

        The Company will not issue fractional shares of Common Stock upon
conversion of Securities. In lieu thereof, the Company will pay an amount in
cash for the current market value of the fractional shares. The current market
value of a fractional share shall be determined, (calculated to the nearest
1/1000th of a share) by multiplying the Closing Price (determined as set forth
in Section 4.6(d)) of the Common Stock on the Trading Day immediately prior to
the Conversion Date by such fractional share and rounding the product to the
nearest whole cent.

        SECTION 4.4. TAXES ON CONVERSION.

        If a Holder converts a Security, the Company shall pay any documentary,
stamp or similar issue or transfer tax due on the issue of shares of Common
Stock upon such conversion. However, the Holder shall pay any such tax which is
due because the Holder requests the shares to be issued in a name other than the
Holder's name. The Conversion Agent may refuse to deliver the certificate
representing the Common Stock being issued in a name other than the Holder's
name until the Conversion Agent receives a sum sufficient to pay any tax which
will be due because the shares are to be issued in a name other than the
Holder's name. Nothing herein shall preclude any tax withholding required by law
or regulation.

        SECTION 4.5. COMPANY TO PROVIDE STOCK.

        The Company shall, prior to issuance of any Securities hereunder, and
from time to time as may be necessary, reserve, out of its authorized but
unissued Common Stock, a sufficient number of shares of Common Stock to permit
the conversion of all outstanding Securities into shares of Common Stock.

        All shares of Common Stock delivered upon conversion of the Securities
shall be newly issued shares, shall be duly authorized, validly issued, fully
paid and nonassessable and shall be free from preemptive rights and free of any
lien or adverse claim.

        The Company will endeavor promptly to comply with all federal and state
securities laws regulating the offer and delivery of shares of Common Stock upon
conversion of Securities, if any, and will list or cause to have quoted such
shares of Common Stock on each national securities exchange or on the Nasdaq
National Market or other over-the-counter market or such other market on which
the Common Stock is then listed or quoted; provided, however, that if rules of
such automated quotation system or exchange permit the Company to defer the
listing of such Common Stock until the first conversion of the Notes into Common
Stock in accordance with the provisions of this Indenture, the Company covenants
to list such Common Stock issuable upon conversion of the Notes in accordance
with the requirements of such automated quotation system or exchange at such
time. Any Common Stock issued upon conversion of a Security hereunder which at
the time of conversion was a Restricted Security will also be a Restricted
Security.

        SECTION 4.6. ADJUSTMENT OF CONVERSION PRICE.

        The conversion price as stated in paragraph 8 of the Securities (the
"Conversion Price") shall be adjusted from time to time by the Company as
follows:

                                       25
<PAGE>

        (a) In case the Company shall (i) pay a dividend on its Common Stock in
shares of Common Stock, (ii) make a distribution on its Common Stock in shares
of Common Stock, (iii) subdivide its outstanding Common Stock into a greater
number of shares, or (iv) combine its outstanding Common Stock into a smaller
number of shares, the Conversion Price in effect immediately prior thereto shall
be adjusted so that the Holder of any Security thereafter surrendered for
conversion shall be entitled to receive that number of shares of Common Stock
which it would have owned had such Security been converted immediately prior to
the happening of such event. An adjustment made pursuant to this subsection (a)
shall become effective immediately after the record date in the case of a
dividend or distribution and shall become effective immediately after the
effective date in the case of subdivision or combination.

        (b) In case the Company shall issue rights or warrants to all or
substantially all holders of its Common Stock entitling them (for a period
commencing no earlier than the record date described below and expiring not more
than 60 days after such record date) to subscribe for or purchase shares of
Common Stock (or securities convertible into Common Stock) at a price per share
(or having a conversion price per share) less than the Current Market Price per
share of Common Stock (as determined in accordance with subsection (d) of this
Section 4.6) on the record date for the determination of stockholders entitled
to receive such rights or warrants, the Conversion Price in effect immediately
prior thereto shall be adjusted so that the same shall equal the price
determined by multiplying the Conversion Price in effect immediately prior to
such record date by a fraction of which the numerator shall be the number of
shares of Common Stock outstanding on such record date plus the number of shares
which the aggregate offering price of the total number of shares of Common Stock
so offered (or the aggregate conversion price of the convertible securities so
offered, which shall be determined by multiplying the number of shares of Common
Stock issuable upon conversion of such convertible securities by the conversion
price per share of Common Stock pursuant to the terms of such convertible
securities) would purchase at the Current Market Price per share (as defined in
subsection (d) of this Section 4.6) of Common Stock on such record date, and of
which the denominator shall be the number of shares of Common Stock outstanding
on such record date plus the number of additional shares of Common Stock offered
(or into which the convertible securities so offered are convertible). Such
adjustment shall be made successively whenever any such rights or warrants are
issued, and shall become effective immediately after such record date. If at the
end of the period during which such rights or warrants are exercisable not all
rights or warrants shall have been exercised, the adjusted Conversion Price
shall be immediately readjusted to what it would have been based upon the number
of additional shares of Common Stock actually issued (or the number of shares of
Common Stock issuable upon conversion of convertible securities actually
issued).

        (c) In case the Company shall distribute to all or substantially all
holders of its Common Stock any shares of capital stock of the Company (other
than Common Stock), evidences of indebtedness or other non-cash assets
(including securities of any person other than the Company but excluding (1)
dividends or distributions paid exclusively in cash or (2) dividends or
distributions referred to in subsection (a) of this Section 4.6), or shall
distribute to all or substantially all holders of its Common Stock rights or
warrants to subscribe for or purchase any of its securities (excluding those
rights and warrants referred to in subsection (b) of this Section 4.6 and also
excluding the distribution of rights to all holders of Common Stock pursuant to
the adoption of a stockholders rights plan or the detachment of such rights
under the terms of such stockholder rights plan), then in each such case the
Conversion Price shall be adjusted so that the same shall equal the price
determined by multiplying the current Conversion Price by a fraction of which
the numerator shall be the Current Market Price per share (as defined in
subsection (d) of this Section 4.6) of the Common Stock on the record date
mentioned below less the fair market value on such record date (as determined by
the Board of Directors, whose determination shall be conclusive evidence of such
fair market value and which shall be evidenced by an Officers' Certificate
delivered to the Trustee) of the portion of the capital stock, evidences of
indebtedness or other non-cash

                                       26
<PAGE>

assets so distributed or of such rights or warrants applicable to one share of
Common Stock (determined on the basis of the number of shares of Common Stock
outstanding on the record date), and of which the denominator shall be the
Current Market Price per share (as defined in subsection (d) of this Section
4.6) of the Common Stock on such record date. Such adjustment shall be made
successively whenever any such distribution is made and shall become effective
immediately after the record date for the determination of shareholders entitled
to receive such distribution.

         In the event the then fair market value (as so determined) of the
portion of the capital stock, evidences of indebtedness or other non-cash assets
so distributed or of such rights or warrants applicable to one share of Common
Stock is equal to or greater than the Current Market Price per share of the
Common Stock on such record date, in lieu of the foregoing adjustment, adequate
provision shall be made so that each holder of a Security shall have the right
to receive upon conversion the amount of capital stock, evidences of
indebtedness or other non-cash assets so distributed or of such rights or
warrants such holder would have received had such holder converted each Security
on such record date. In the event that such dividend or distribution is not so
paid or made, the Conversion Price shall again be adjusted to be the Conversion
Price which would then be in effect if such dividend or distribution had not
been declared. If the Board of Directors determines the fair market value of any
distribution for purposes of this Section 4.6(c) by reference to the actual or
when issued trading market for any securities, it must in doing so consider the
prices in such market over the same period used in computing the Current Market
Price of the Common Stock.

         In the event that the Company implements a preferred shares rights plan
("Rights Plan"), upon conversion of the Securities into Common Stock, to the
extent that the Rights Plan has been implemented and is still in effect upon
such conversion, the holders of Securities will receive, in addition to the
Common Stock, the rights described therein (whether or not the rights have
separated from the Common Stock at the time of conversion), subject to the
limitations set forth in the Rights Plan. Any distribution of rights or warrants
pursuant to a Rights Plan complying with the requirements set forth in the
immediately preceding sentence of this paragraph shall not constitute a
distribution of rights or warrants pursuant to this Section 4.6(c).

         Rights or warrants distributed by the Company to all holders of Common
Stock entitling the holders thereof to subscribe for or purchase shares of the
Company's Capital Stock (either initially or under certain circumstances), which
rights or warrants, until the occurrence of a specified event or events
("Trigger Event"): (i) are deemed to be transferred with such shares of Common
Stock; (ii) are not exercisable; and (iii) are also issued in respect of future
issuances of Common Stock, shall be deemed not to have been distributed for
purposes of this Section 4.6 (and no adjustment to the Conversion Price under
this Section 4.6 will be required) until the occurrence of the earliest Trigger
Event, whereupon such rights and warrants shall be deemed to have been
distributed and an appropriate adjustment (if any is required) to the Conversion
Price shall be made under this Section 4.6(c). If any such right or warrant,
including any such existing rights or warrants distributed prior to the date of
this Indenture, are subject to events, upon the occurrence of which such rights
or warrants become exercisable to purchase different securities, evidences of
indebtedness or other assets, then the date of the occurrence of any and each
such event shall be deemed to be the date of distribution and record date with
respect to new rights or warrants with such rights (and a termination or
expiration of the existing rights or warrants without exercise by any of the
holders thereof). In addition, in the event of any distribution (or deemed
distribution) of rights or warrants, or any Trigger Event or other event (of the
type described in the preceding sentence) with respect thereto that was counted
for purposes of calculating a distribution amount for which an adjustment to the
Conversion Price under this Section 4.6 was made, (1) in the case of any such
rights or warrants which shall all have been redeemed or repurchased without
exercise by any holders thereof, the Conversion Price shall be readjusted upon
such final redemption or repurchase to give effect to such distribution or
Trigger Event, as the case may be, as though it were a cash distribution, equal
to the per

                                       27
<PAGE>

share redemption or repurchase price received by a holder or holders of Common
Stock with respect to such rights or warrants (assuming such holder had retained
such rights or warrants), made to all holders of Common Stock as of the date of
such redemption or repurchase, and (2) in the case of such rights or warrants
which shall have expired or been terminated without exercise by any holders
thereof, the Conversion Price shall be readjusted as if such rights and warrants
had not been issued.

        (1)     In case the Company shall, by dividend or otherwise, at any time
distribute (a "Triggering Distribution") to all or substantially all holders of
its Common Stock cash in an aggregate amount that, together with the aggregate
amount of (A) any cash and the fair market value (as determined by the Board of
Directors, whose determination shall be conclusive evidence thereof and which
shall be evidenced by an Officers' Certificate delivered to the Trustee) of any
other consideration payable in respect of any tender offer by the Company or a
Subsidiary of the Company for Common Stock consummated within the 12 months
preceding the date of payment of the Triggering Distribution and in respect of
which no Conversion Price adjustment pursuant to this Section 4.6 has been made
and (B) all other cash distributions to all or substantially all holders of its
Common Stock made within the 12 months preceding the date of payment of the
Triggering Distribution and in respect of which no Conversion Price adjustment
pursuant to this Section 4.6 has been made, exceeds an amount equal to 10.0% of
the product of the Current Market Price per share of Common Stock (as determined
in accordance with subsection (d) of this Section 4.6) on the Business Day (the
"Determination Date") immediately preceding the day on which such Triggering
Distribution is declared by the Company multiplied by the number of shares of
Common Stock outstanding on the Determination Date (excluding shares held in the
treasury of the Company), the Conversion Price shall be reduced so that the same
shall equal the price determined by multiplying such Conversion Price in effect
immediately prior to the Determination Date by a fraction of which the numerator
shall be the Current Market Price per share of the Common Stock (as determined
in accordance with subsection (d) of this Section 4.6) on the Determination Date
less the sum of the aggregate amount of cash and the aggregate fair market value
(determined as aforesaid in this Section 4.6(c)(1)) of any such other
consideration so distributed, paid or payable within such 12 months (including,
without limitation, the Triggering Distribution) applicable to one share of
Common Stock (determined on the basis of the number of shares of Common Stock
outstanding on the Determination Date) and the denominator shall be such Current
Market Price per share of the Common Stock (as determined in accordance with
subsection (d) of this Section 4.6) on the Determination Date, such reduction to
become effective immediately prior to the opening of business on the day
following the date on which the Triggering Distribution is paid.

        (2)     In case any tender offer made by the Company or any of its
Subsidiaries for Common Stock shall expire and such tender offer (as amended
upon the expiration thereof) shall involve the payment of aggregate
consideration in an amount (determined as the sum of the aggregate amount of
cash consideration and the aggregate fair market value (as determined by the
Board of Directors, whose determination shall be conclusive evidence thereof and
which shall be evidenced by an Officers' Certificate delivered to the Trustee
thereof) of any other consideration) that, together with the aggregate amount of
(A) any cash and the fair market value (as determined by the Board of Directors,
whose determination shall be conclusive evidence thereof and which shall be
evidenced by an Officers' Certificate delivered to the Trustee) of any other
consideration payable in respect of any other tender offers by the Company or
any Subsidiary of the Company for Common Stock consummated within the 12 months
preceding the date of the Expiration Date (as defined below) and in respect of
which no Conversion Price adjustment pursuant to this Section 4.6 has been made
and (B) all cash distributions to all or substantially all holders of its Common
Stock made within the 12 months preceding the Expiration Date and in respect of
which no Conversion Price adjustment pursuant to this Section 4.6 has been made,
exceeds an amount equal to 10.0% of the product of the Current Market Price per
share of Common Stock (as determined in accordance with subsection (d) of this
Section 4.6) as of the last date (the "Expiration Date") tenders could have been
made pursuant to such tender offer (as it may be amended) (the last time

                                       28
<PAGE>

at which such tenders could have been made on the Expiration Date is hereinafter
sometimes called the "Expiration Time") multiplied by the number of shares of
Common Stock outstanding (including tendered shares but excluding any shares
held in the treasury of the Company) at the Expiration Time, then, immediately
prior to the opening of business on the day after the Expiration Date, the
Conversion Price shall be reduced so that the same shall equal the price
determined by multiplying the Conversion Price in effect immediately prior to
the close of business on the Expiration Date by a fraction of which the
numerator shall be the product of the number of shares of Common Stock
outstanding (including tendered shares but excluding any shares held in the
treasury of the Company) at the Expiration Time multiplied by the Current Market
Price per share of the Common Stock (as determined in accordance with subsection
(d) of this Section 4.6) on the Trading Day next succeeding the Expiration Date
and the denominator shall be the sum of (x) the aggregate consideration
(determined as aforesaid) payable to stockholders based on the acceptance (up to
any maximum specified in the terms of the tender offer) of all shares validly
tendered and not withdrawn as of the Expiration Time (the shares deemed so
accepted, up to any such maximum, being referred to as the "Purchased Shares")
and (y) the product of the number of shares of Common Stock outstanding (less
any Purchased Shares and excluding any shares held in the treasury of the
Company) at the Expiration Time and the Current Market Price per share of Common
Stock (as determined in accordance with subsection (d) of this Section 4.6) on
the Trading Day next succeeding the Expiration Date, such reduction to become
effective immediately prior to the opening of business on the day following the
Expiration Date. In the event that the Company is obligated to purchase shares
pursuant to any such tender offer, but the Company is permanently prevented by
applicable law from effecting any or all such purchases or any or all such
purchases are rescinded, the Conversion Price shall again be adjusted to be the
Conversion Price which would have been in effect based upon the number of shares
actually purchased. If the application of this Section 4.6(c)(2) to any tender
offer would result in an increase in the Conversion Price, no adjustment shall
be made for such tender offer under this Section 4.6(c)(2).

                (3)     For purposes of this Section 4.6(c), the term "tender
offer" shall mean and include both tender offers and exchange offers, all
references to "purchases" of shares in tender offers (and all similar
references) shall mean and include both the purchase of shares in tender offers
and the acquisition of shares pursuant to exchange offers, and all references to
"tendered shares" (and all similar references) shall mean and include shares
tendered in both tender offers and exchange offers.

        (d) For the purpose of any computation under subsections (b) and (c) of
this Section 4.6, the current market price (the "Current Market Price") per
share of Common Stock on any date shall be deemed to be the average of the daily
closing prices for the 30 consecutive Trading Days commencing 45 Trading Days
before (i) the Determination Date or the Expiration Date, as the case may be,
with respect to distributions or tender offers under subsection (c) of this
Section 4.6 or (ii) the record date with respect to distributions, issuances or
other events requiring such computation under subsection (b) or (c) of this
Section 4.6. The closing price (the "Closing Price") for each day shall be the
last reported sales price or, in case no such reported sale takes place on such
date, the average of the reported closing bid and asked prices in either case on
the Nasdaq National Market (the "NNM") or, if the Common Stock is not listed or
admitted to trading on the NNM, on the principal national securities exchange on
which the Common Stock is listed or admitted to trading or, if not listed or
admitted to trading on the NNM or any national securities exchange, the last
reported sales price of the Common Stock as quoted on NASDAQ or, in case no
reported sales takes place, the average of the closing bid and asked prices as
quoted on NASDAQ or any comparable system or, if the Common Stock is not quoted
on NASDAQ or any comparable system, the closing sales price or, in case no
reported sale takes place, the average of the closing bid and asked prices, as
furnished by any two members of the National Association of Securities Dealers,
Inc. selected from time to time by the Company for that purpose. If no such
prices are available, the Current Market Price per share shall be the fair value
of a share of Common Stock as determined by the Board of Directors (which shall
be evidenced by an Officers' Certificate delivered to the Trustee).

                                       29
<PAGE>

        (e) In any case in which this Section 4.6 shall require that an
adjustment be made following a record date or a Determination Date or Expiration
Date, as the case may be, established for purposes of this Section 4.6, the
Company may elect to defer (but only until five Business Days following the
filing by the Company with the Trustee of the certificate described in Section
4.9) issuing to the Holder of any Security converted after such record date or
Determination Date or Expiration Date the shares of Common Stock and other
capital stock of the Company issuable upon such conversion over and above the
shares of Common Stock and other capital stock of the Company issuable upon such
conversion only on the basis of the Conversion Price prior to adjustment; and,
in lieu of the shares the issuance of which is so deferred, the Company shall
issue or cause its transfer agents to issue due bills or other appropriate
evidence prepared by the Company of the right to receive such shares. If any
distribution in respect of which an adjustment to the Conversion Price is
required to be made as of the record date or Determination Date or Expiration
Date therefor is not thereafter made or paid by the Company for any reason, the
Conversion Price shall be readjusted to the Conversion Price which would then be
in effect if such record date had not been fixed or such effective date or
Determination Date or Expiration Date had not occurred.

        SECTION 4.7. NO ADJUSTMENT.

        No adjustment in the Conversion Price shall be required unless the
adjustment would require an increase or decrease of at least 1% in the
Conversion Price as last adjusted; provided, however, that any adjustments which
by reason of this Section 4.7 are not required to be made shall be carried
forward and taken into account in any subsequent adjustment. All calculations
under this Article 4 shall be made to the nearest cent or to the nearest
one-hundredth of a share, as the case may be.

        No adjustment need be made for issuances of Common Stock pursuant to a
Company plan for reinvestment of dividends or interest or for a change in the
par value or a change to no par value of the Common Stock.

        To the extent that the Securities become convertible into the right to
receive cash, no adjustment need be made thereafter as to the cash. Interest
will not accrue on the cash.

        SECTION 4.8. ADJUSTMENT FOR TAX PURPOSES.

        The Company shall be entitled to make such reductions in the Conversion
Price, in addition to those required by Section 4.6, as it in its discretion
shall determine to be advisable in order that any stock dividends, subdivisions
of shares, distributions of rights to purchase stock or securities or
distributions of securities convertible into or exchangeable for stock hereafter
made by the Company to its stockholders shall not be taxable.

        SECTION 4.9. NOTICE OF ADJUSTMENT.

        Whenever the Conversion Price or conversion privilege is adjusted, the
Company shall promptly mail to Securityholders a notice of the adjustment and
file with the Trustee an Officers' Certificate briefly stating the facts
requiring the adjustment and the manner of computing it. Unless and until the
Trustee shall receive an Officers' Certificate setting forth an adjustment of
the Conversion Price, the Trustee may assume without inquiry that the Conversion
Price has not been adjusted and that the last Conversion Price of which it has
knowledge remains in effect.

        SECTION 4.10. NOTICE OF CERTAIN TRANSACTIONS.

        In the event that:

                                       30
<PAGE>

                (1)     the Company takes any action which would require an
adjustment in the Conversion Price;

                (2)     the Company consolidates or merges with, or transfers
all or substantially all of its property and assets to, another corporation and
shareholders of the Company must approve the transaction; or

                (3)     there is a dissolution or liquidation of the Company,

the Company shall mail to Holders and file with the Trustee a notice stating the
proposed record or effective date, as the case may be. The Company shall mail
the notice at least ten days before such date. Failure to mail such notice or
any defect therein shall not affect the validity of any transaction referred to
in clause (1), (2) or (3) of this Section 4.10.

        SECTION 4.11. EFFECT OF RECLASSIFICATION, CONSOLIDATION, MERGER OR SALE
                      ON CONVERSION PRIVILEGE.

        If any of the following shall occur, namely: (a) any reclassification or
change of shares of Common Stock issuable upon conversion of the Securities
(other than a change in par value, or from par value to no par value, or from no
par value to par value, or as a result of a subdivision or combination, or any
other change for which an adjustment is provided in Section 4.6); (b) any
consolidation or merger or combination to which the Company is a party other
than a merger in which the Company is the continuing corporation and which does
not result in any reclassification of, or change (other than in par value, or
from par value to no par value, or from no par value to par value, or as a
result of a subdivision or combination) in, outstanding shares of Common Stock;
or (c) any sale or conveyance as an entirety or substantially as an entirety of
the property and assets of the Company, directly or indirectly, to any person,
then the Company, or such successor, purchasing or transferee corporation, as
the case may be, shall, as a condition precedent to such reclassification,
change, combination, consolidation, merger, sale or conveyance, execute and
deliver to the Trustee a supplemental indenture providing that the Holder of
each Security then outstanding shall have the right to convert such Security
into the kind and amount of shares of stock and other securities and property
(including cash) receivable upon such reclassification, change, combination,
consolidation, merger, sale or conveyance by a holder of the number of shares of
Common Stock deliverable upon conversion of such Security immediately prior to
such reclassification, change, combination, consolidation, merger, sale or
conveyance. Such supplemental indenture shall provide for adjustments of the
Conversion Price which shall be as nearly equivalent as may be practicable to
the adjustments of the Conversion Price provided for in this Article 4. If, in
the case of any such consolidation, merger, combination, sale or conveyance, the
stock or other securities and property (including cash) receivable thereupon by
a holder of Common Stock include shares of stock or other securities and
property of a person other than the successor, purchasing or transferee
corporation, as the case may be, in such consolidation, merger, combination,
sale or conveyance, then such supplemental indenture shall also be executed by
such other person and shall contain such additional provisions to protect the
interests of the Holders of the Securities as the Board of Directors shall
reasonably consider necessary by reason of the foregoing. The provisions of this
Section 4.11 shall similarly apply to successive reclassifications, changes,
combinations, consolidations, mergers, sales or conveyances.

        In the event the Company shall execute a supplemental indenture pursuant
to this Section 4.11, the Company shall promptly file with the Trustee (x) an
Officers' Certificate briefly stating the reasons therefor, the kind or amount
of shares of stock or other securities or property (including cash) receivable
by Holders of the Securities upon the conversion of their Securities after any
such reclassification, change, combination, consolidation, merger, sale or
conveyance, any adjustment to be made with respect

                                       31
<PAGE>

thereto and that all conditions precedent have been complied with and (y) an
Opinion of Counsel that all conditions precedent have been complied with, and
shall promptly mail notice thereof to all Holders.

        SECTION 4.12. TRUSTEE'S DISCLAIMER.

        The Trustee shall have no duty to determine when an adjustment under
this Article 4 should be made, how it should be made or what such adjustment
should be, but may accept as conclusive evidence of that fact or the correctness
of any such adjustment, and shall be protected in relying upon, an Officers'
Certificate including the Officers' Certificate with respect thereto which the
Company is obligated to file with the Trustee pursuant to Section 4.9. The
Trustee makes no representation as to the validity or value of any securities or
assets issued upon conversion of Securities, and the Trustee shall not be
responsible for the Company's failure to comply with any provisions of this
Article 4.

        The Trustee shall not be under any responsibility to determine the
correctness of any provisions contained in any supplemental indenture executed
pursuant to Section 4.11, but may accept as conclusive evidence of the
correctness thereof, and shall be fully protected in relying upon, the Officers'
Certificate with respect thereto which the Company is obligated to file with the
Trustee pursuant to Section 4.11.

        SECTION 4.13. VOLUNTARY REDUCTION.

        The Company from time to time may reduce the Conversion Price by any
amount for any period of time if the period is at least 20 days and if the
reduction is irrevocable during the period if our Board of Directors determines
that such reduction would be in the best interest of the Company or to avoid or
diminish income tax to holders of shares of our Common Stock in connection with
a dividend or distribution of stock or similar event, and the Company provides
15 days prior notice of any reduction in the Conversion Price; provided,
however, that in no event may the Company reduce the Conversion Price to be less
than the par value of a share of Common Stock.

                                   ARTICLE 5
                                 SUBORDINATION

        SECTION 5.1. AGREEMENT OF SUBORDINATION.

        The Company covenants and agrees, and each Holder of Securities issued
hereunder by its acceptance thereof likewise covenants and agrees, that all
Securities shall be issued subject to the provisions of this Article 5; and each
Person holding any Security, whether upon original issue or upon transfer,
assignment or exchange thereof, accepts and agrees to be bound by such
provisions.

        The payment of the principal of, premium, if any, and interest
(including Additional Interest, if any) on all Securities (including, but not
limited to, the Redemption Price with respect to the Securities called for
redemption or the Change in Control Purchase Price with respect to the
Securities subject to purchase in accordance with Article 3 as provided in this
Indenture) issued hereunder shall, to the extent and in the manner hereinafter
set forth, be subordinated and subject in right of payment to the prior payment
in full in cash or payment satisfactory to the holders of Senior Indebtedness of
all Senior Indebtedness, whether outstanding at the date of this Indenture or
thereafter incurred.

        No provision of this Article 5 shall prevent the occurrence of any
default or Event of Default hereunder.

                                       32
<PAGE>

        SECTION 5.2. PAYMENTS TO HOLDERS.

        No payment shall be made with respect to the principal of, or premium,
if any, or interest (including Additional Interest, if any) on the Securities
(including, but not limited to, the Redemption Price with respect to the
Securities to be called for redemption or the Change in Control Purchase Price
with respect to the Securities subject to purchase in accordance with Article 3
as provided in this Indenture), except payments and distributions made by the
Trustee as permitted by the first or second paragraph of Section 5.5, if:

        (i)     a default in the payment of principal, premium, interest, rent
or other obligations due on any Senior Indebtedness occurs and is continuing
(or, in the case of Senior Indebtedness for which there is a period of grace, in
the event of such a default that continues beyond the period of grace, if any,
specified in the instrument or lease evidencing such Senior Indebtedness),
unless and until such default shall have been cured or waived or shall have
ceased to exist; or

        (ii)    a default, other than a payment default, on any Designated
Senior Indebtedness occurs and is continuing that then permits holders of such
Designated Senior Indebtedness to accelerate its maturity and the Trustee
receives a notice of the default (a "Payment Blockage Notice") from a
Representative or holder of such Designated Senior Indebtedness or the Company.

        Subject to the provisions of Section 5.5, if the Trustee receives any
Payment Blockage Notice pursuant to clause (ii) above, no subsequent Payment
Blockage Notice shall be effective for purposes of this Section unless and until
at least 365 days shall have elapsed since the initial effectiveness of the
immediately prior Payment Blockage Notice and all scheduled payments on the
Securities that have come due have been paid in full in cash. No nonpayment
default that existed or was continuing on the date of delivery of any Payment
Blockage Notice to the Trustee (unless such default was waived, cured or
otherwise ceased to exist and thereafter subsequently reoccurred) shall be, or
be made, the basis for a subsequent Payment Blockage Notice.

        The Company may and shall resume payments on and distributions in
respect of the Securities upon the earlier of:

        (a) in the case of a default referred to in clause (i) above, the date
upon which the default is cured or waived or ceases to exist, or

        (b) in the case of a default referred to in clause (ii) above, the
earlier of the date on which such default is cured or waived or ceases to exist
or 179 days pass after the date on which the applicable Payment Blockage Notice
is received, if the maturity of such Designated Senior Indebtedness has not been
accelerated, unless this Article 5 otherwise prohibits the payment or
distribution at the time of such payment or distribution.

        Upon any payment by the Company, or distribution of assets of the
Company of any kind or character, whether in cash, property or securities, to
creditors upon any dissolution or winding-up or liquidation or reorganization of
the Company (whether voluntary or involuntary) or in bankruptcy, insolvency,
receivership or similar proceedings, all amounts due or to become due upon all
Senior Indebtedness shall first be paid in full in cash, or other payments
satisfactory to the holders of Senior Indebtedness before any payment is made on
account of the principal of, premium, if any, or interest (including Additional
Interest, if any) on the Securities (except payments made pursuant to Article 10
from monies deposited with the Trustee pursuant thereto prior to commencement of
proceedings for such dissolution, winding-up, liquidation or reorganization);
and upon any such dissolution or winding-up or liquidation or reorganization of
the Company or bankruptcy, insolvency, receivership or other proceeding,

                                       33
<PAGE>

any payment by the Company, or distribution of assets of the Company of any kind
or character, whether in cash, property or securities, to which the Holders of
the Securities or the Trustee would be entitled, except for the provision of
this Article 5, shall (except as aforesaid) be paid by the Company or by any
receiver, trustee in bankruptcy, liquidating trustee, agent or other Person
making such payment or distribution, or by the Holders of the Securities or by
the Trustee under this Indenture if received by them or it, directly to the
holders of Senior Indebtedness (pro rata to such holders on the basis of the
respective amounts of Senior Indebtedness held by such holders, or as otherwise
required by law or a court order) or their representative or representatives, or
to the trustee or trustees under any indenture pursuant to which any instruments
evidencing any Senior Indebtedness may have been issued, as their respective
interests may appear, to the extent necessary to pay all Senior Indebtedness in
full in cash, or other payment satisfactory to the holders of Senior
Indebtedness, after giving effect to any concurrent payment or distribution to
or for the holders of Senior Indebtedness, before any payment or distribution is
made to the Holders of the Securities or to the Trustee.

         For purposes of this Article 5, the words, "cash, property or
securities" shall not be deemed to include shares of stock of the Company as
reorganized or readjusted, or securities of the Company or any other corporation
provided for by a plan of reorganization or readjustment, the payment of which
is subordinated at least to the extent provided in this Article 5 with respect
to the Securities to the payment of all Senior Indebtedness which may at the
time be outstanding; provided that (i) the Senior Indebtedness is assumed by the
new corporation, if any, resulting from any reorganization or readjustment, and
(ii) the rights of the holders of Senior Indebtedness (other than leases which
are not assumed by the Company or the new corporation, as the case may be) are
not, without the consent of such holders, altered by such reorganization or
readjustment. The consolidation of the Company with, or the merger of the
Company into, another corporation or the liquidation or dissolution of the
Company following the conveyance, transfer or lease of its property as an
entirety, or substantially as an entirety, to another corporation upon the terms
and conditions provided for in Article 7 shall not be deemed a dissolution,
winding-up, liquidation or reorganization for the purposes of this Section 5.2
if such other corporation shall, as a part of such consolidation, merger,
conveyance, transfer or lease, comply with the conditions stated in Article 7.

         In the event of the acceleration of the Securities because of an Event
of Default, no payment or distribution shall be made to the Trustee or any
Holder of Securities in respect of the principal of, premium, if any, or
interest (including Additional Interest, if any) on the Securities by the
Company (including, but not limited to, the Redemption Price with respect to the
Securities called for redemption or the Change in Control Purchase Price with
respect to the Securities subject to purchase in accordance with Article 3 as
provided in this Indenture), except payments and distributions made by the
Trustee as permitted by Section 5.5, until all Senior Indebtedness has been paid
in full in cash or other payment satisfactory to the holders of Senior
Indebtedness or such acceleration is rescinded in accordance with the terms of
this Indenture. If payment of the Securities is accelerated because of an Event
of Default, the Company shall promptly notify holders of Senior Indebtedness of
such acceleration.

         In the event that, notwithstanding the foregoing provisions, any
payment or distribution of assets of the Company of any kind or character,
whether in cash, property or securities (including, without limitation, by way
of setoff or otherwise), prohibited by the foregoing, shall be received by the
Trustee or the Holders of the Securities before all Senior Indebtedness is paid
in full, in cash or other payment satisfactory to the holders of Senior
Indebtedness, or provision is made for such payment thereof in accordance with
its terms in cash or other payment satisfactory to the holders of Senior
Indebtedness, such payment or distribution shall be held in trust for the
benefit of and shall be paid over or delivered to the holders of Senior
Indebtedness or their representative or representatives, or to the trustee or
trustees under any indenture pursuant to which any instruments evidencing any
Senior Indebtedness may have been issued, as their respective interests may
appear, as calculated by the Company, for application to the

                                       34
<PAGE>

payment of all Senior Indebtedness remaining unpaid to the extent necessary to
pay all Senior Indebtedness in full, in cash or other payment satisfactory to
the holders of Senior Indebtedness, after giving effect to any concurrent
payment or distribution to or for the holders of such Senior Indebtedness.

         Nothing in this Section 5.2 shall apply to claims of, or payments to,
the Trustee under or pursuant to Section 9.7. This Section 5.2 shall be subject
to the further provisions of Section 5.5.

        SECTION 5.3. SUBROGATION OF SECURITIES.

        Subject to the payment in full, in cash or other payment satisfactory to
the holders of Senior Indebtedness, of all Senior Indebtedness, the rights of
the Holders of the Securities shall be subrogated to the extent of the payments
or distributions made to the holders of such Senior Indebtedness pursuant to the
provisions of this Article 5 (equally and ratably with the holders of all
indebtedness of the Company which by its express terms is subordinated to other
indebtedness of the Company to substantially the same extent as the Securities
are subordinated and is entitled to like rights of subrogation) to the rights of
the holders of Senior Indebtedness to receive payments or distributions of cash,
property or securities of the Company applicable to the Senior Indebtedness
until the principal, premium, if any, and interest (including Additional
Interest, if any) on the Securities shall be paid in full in cash or other
payment satisfactory to the holders of Senior Indebtedness; and, for the
purposes of such subrogation, no payments or distributions to the holders of the
Senior Indebtedness of any cash, property or securities to which the Holders of
the Securities or the Trustee would be entitled except for the provisions of
this Article 5, and no payment over pursuant to the provisions of this Article
5, to or for the benefit of the holders of Senior Indebtedness by Holders of the
Securities or the Trustee, shall, as between the Company, its creditors other
than holders of Senior Indebtedness, and the Holders of the Securities, be
deemed to be a payment by the Company to or on account of the Senior
Indebtedness; and no payments or distributions of cash, property or securities
to or for the benefit of the Holders of the Securities pursuant to the
subrogation provisions of this Article 5, which would otherwise have been paid
to the holders of Senior Indebtedness shall be deemed to be a payment by the
Company to or for the account of the Securities. It is understood that the
provisions of this Article 5 are and are intended solely for the purposes of
defining the relative rights of the Holders of the Securities, on the one hand,
and the holders of the Senior Indebtedness, on the other hand.

        Nothing contained in this Article 5 or elsewhere in this Indenture or in
the Securities is intended to or shall impair, as among the Company, its
creditors other than the holders of Senior Indebtedness, and the Holders of the
Securities, the obligation of the Company, which is absolute and unconditional,
to pay to the Holders of the Securities the principal of (and premium, if any)
and interest on the Securities as and when the same shall become due and payable
in accordance with their terms, or is intended to or shall affect the relative
rights of the Holders of the Securities and creditors of the Company other than
the holders of the Senior Indebtedness, nor shall anything herein or therein
prevent the Trustee or the Holder of any Security from exercising all remedies
otherwise permitted by applicable law upon default under this Indenture, subject
to the rights, if any, under this Article 5 of the holders of Senior
Indebtedness in respect of cash, property or securities of the Company received
upon the exercise of any such remedy.

        Upon any payment or distribution of assets of the Company referred to in
this Article 5, the Trustee, subject to the provisions of Section 9.1, and the
Holders of the Securities shall be entitled to rely upon any order or decree
made by any court of competent jurisdiction in which such bankruptcy,
dissolution, winding-up, liquidation or reorganization proceedings are pending,
or a certificate of the receiver, trustee in bankruptcy, liquidating trustee,
agent or other person making such payment or distribution, delivered to the
Trustee or to the Holders of the Securities, for the purpose of ascertaining the
persons entitled to participate in such distribution, the holders of the Senior
Indebtedness and other

                                       35
<PAGE>

indebtedness of the Company, the amount thereof or payable thereon and all other
facts pertinent thereto or to this Article 5.

        SECTION 5.4. AUTHORIZATION TO EFFECT SUBORDINATION.

        Each Holder of a Security by the Holder's acceptance thereof authorizes
and directs the Trustee on the Holder's behalf to take such action as may be
necessary or appropriate to effectuate the subordination as provided in this
Article 5 and appoints the Trustee to act as the Holder's attorney-in-fact for
any and all such purposes. If the Trustee does not file a proper proof of claim
or proof of debt in the form required in any proceeding referred to in Section
5.3 hereof at least 30 days before the expiration of the time to file such
claim, the holders of any Senior Indebtedness or their representatives are
hereby authorized to file an appropriate claim for and on behalf of the Holders
of the Securities.

        SECTION 5.5. NOTICE TO TRUSTEE.

        The Company shall give prompt written notice in the form of an Officers'
Certificate to a Trust Officer of the Trustee and to any Paying Agent of any
fact known to the Company which would prohibit the making of any payment of
monies to or by the Trustee or any Paying Agent in respect of the Securities
pursuant to the provisions of this Article 5. Notwithstanding the provisions of
this Article 5 or any other provision of this Indenture, the Trustee shall not
be charged with knowledge of the existence of any facts which would prohibit the
making of any payment of monies to or by the Trustee in respect of the
Securities pursuant to the provisions of this Article 5, unless and until a
Trust Officer of the Trustee shall have received written notice thereof at the
Corporate Trust Office from the Company (in the form of an Officers'
Certificate) or a Representative or a Holder or Holders of Senior Indebtedness
or from any trustee thereof; and before the receipt of any such written notice,
the Trustee, subject to the provisions of Section 9.1, shall be entitled in all
respects to assume that no such facts exist; provided that if on a date not less
than one Business Day prior to the date upon which by the terms hereof any such
monies may become payable for any purpose (including, without limitation, the
payment of the principal of, or premium, if any, or interest on any Security)
the Trustee shall not have received, with respect to such monies, the notice
provided for in this Section 5.5, then, anything herein contained to the
contrary notwithstanding, the Trustee shall have full power and authority to
receive such monies and to apply the same to the purpose for which they were
received, and shall not be affected by any notice to the contrary which may be
received by it on or after such prior date. Notwithstanding anything in this
Article 5 to the contrary, nothing shall prevent any payment by the Trustee to
the Holders of monies deposited with it pursuant to Article 10, and any such
payment shall not be subject to the provisions of Article 5.

        The Trustee, subject to the provisions of Section 9.1, shall be entitled
to rely on the delivery to it of a written notice by a Representative or a
person representing himself to be a holder of Senior Indebtedness (or a trustee
on behalf of such holder) to establish that such notice has been given by a
Representative or a holder of Senior Indebtedness or a trustee on behalf of any
such holder or holders. In the event that the Trustee determines in good faith
that further evidence is required with respect to the right of any person as a
holder of Senior Indebtedness to participate in any payment or distribution
pursuant to this Article 5, the Trustee may request such Person to furnish
evidence to the reasonable satisfaction of the Trustee as to the amount of
Senior Indebtedness held by such Person, the extent to which such Person is
entitled to participate in such payment or distribution and any other facts
pertinent to the rights of such Person under this Article 5, and if such
evidence is not furnished the Trustee may defer any payment to such Person
pending judicial determination as to the right of such Person to receive such
payment.

                                       36
<PAGE>

        SECTION 5.6. TRUSTEE'S RELATION TO SENIOR INDEBTEDNESS.

        The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article 5 in respect of any Senior Indebtedness at any
time held by it, to the same extent as any other holder of Senior Indebtedness,
and nothing in Section 9.11 or elsewhere in this Indenture shall deprive the
Trustee of any of its rights as such holder.

        With respect to the holders of Senior Indebtedness, the Trustee
undertakes to perform or to observe only such of its covenants and obligations
as are specifically set forth in this Article 5, and no implied covenants or
obligations with respect to the holders of Senior Indebtedness shall be read
into this Indenture against the Trustee. The Trustee shall not be deemed to owe
any fiduciary duty to the holders of Senior Indebtedness and, subject to the
provisions of Section 9.1, the Trustee shall not be liable to any holder of
Senior Indebtedness if it shall pay over or deliver to Holders of Securities,
the Company or any other person money or assets to which any holder of Senior
Indebtedness shall be entitled by virtue of this Article 5 or otherwise.

        SECTION 5.7. NO IMPAIRMENT OF SUBORDINATION.

        No right of any present or future holder of any Senior Indebtedness to
enforce subordination as herein provided shall at any time in any way be
prejudiced or impaired by any act or failure to act on the part of the Company
or by any act or failure to act, in good faith, by any such holder, or by any
noncompliance by the Company with the terms, provisions and covenants of this
Indenture, regardless of any knowledge thereof which any such holder may have or
otherwise be charged with.

        SECTION 5.8. CERTAIN CONVERSIONS DEEMED PAYMENT.

        For the purposes of this Article 5 only, (1) the issuance and delivery
of junior securities upon conversion of Securities in accordance with Article 4
shall not be deemed to constitute a payment or distribution on account of the
principal of (or premium, if any) or interest on Securities or on account of the
purchase or other acquisition of Securities, and (2) the payment, issuance or
delivery of cash (except in satisfaction of fractional shares pursuant to
Section 4.3), property or securities (other than junior securities) upon
conversion of a Security shall be deemed to constitute payment on account of the
principal of such Security. For the purposes of this Section 5.8, the term
"junior securities" means (a) shares of any stock of any class of the Company,
or (b) securities of the Company which are subordinated in right of payment to
all Senior Indebtedness which may be outstanding at the time of issuance or
delivery of such securities to substantially the same extent as, or to a greater
extent than, the Securities are so subordinated as provided in this Article.
Nothing contained in this Article 5 or elsewhere in this Indenture or in the
Securities is intended to or shall impair, as among the Company, its creditors
other than holders of Senior Indebtedness and the Holders, the right, which is
absolute and unconditional, of the Holder of any Security to convert such
Security in accordance with Article 4.

        SECTION 5.9. ARTICLE APPLICABLE TO PAYING AGENTS.

        If at any time any Paying Agent other than the Trustee shall have been
appointed by the Company and be then acting hereunder, the term "Trustee" as
used in this Article shall (unless the context otherwise requires) be construed
as extending to and including such Paying Agent within its meaning as fully for
all intents and purposes as if such Paying Agent were named in this Article in
addition to or in place of the Trustee; provided, however, that the first
paragraph of Section 5.5 shall not apply to the Company or any Affiliate of the
Company if it or such Affiliate acts as Paying Agent.

                                       37
<PAGE>

        SECTION 5.10. SENIOR INDEBTEDNESS ENTITLED TO RELY.

        The holders of Senior Indebtedness (including, without limitation,
Designated Senior Indebtedness) shall have the right to rely upon this Article
5, and no amendment or modification of the provisions contained herein shall
diminish the rights of such holders unless such holders shall have agreed in
writing thereto.

                                   ARTICLE 6
                                   COVENANTS

        SECTION 6.1. PAYMENT OF SECURITIES.

        The Company shall promptly make all payments in respect of the
Securities on the dates and in the manner provided in the Securities and this
Indenture. An installment of principal or interest or Additional Interest, if
any, shall be considered paid on the date it is due if the Paying Agent (other
than the Company) holds by 11:00 a.m., New York City time, on that date money,
deposited by the Company or an Affiliate thereof, sufficient to pay the
installment. The Company shall, (in immediately available funds) to the fullest
extent permitted by law, pay interest on overdue principal (including premium,
if any) and overdue installments of interest at the rate borne by the Securities
per annum.

        Payment of the principal of (and premium, if any) and any interest on
the Securities shall be made at the office or agency of the Company maintained
for that purpose in the Borough of Manhattan, The City of New York (which shall
initially be State Street Bank and Trust Company, N.A., an Affiliate of the
Trustee, as agent of the Trustee) or at the Corporate Trust Office of the
Trustee in such coin or currency of the United States of America as at the time
of payment is legal tender for payment of public and private debts; provided,
however, that at the option of the Company payment of interest may be made by
check mailed to the address of the Person entitled thereto as such address
appears in the Register; provided further that a Holder with an aggregate
principal amount in excess of $2,000,000 will be paid by wire transfer in
immediately available funds at the election of such Holder if such Holder has
provided wire transfer instructions to the Company at least 10 Business Days
prior to the payment date.

        SECTION 6.2. SEC REPORTS.

        The Company shall file all reports and other information and documents
which it is required to file with the SEC pursuant to Section 13 or 15(d) of the
Exchange Act, and within 15 days after it files them with the SEC, the Company
shall file copies of all such reports, information and other documents with the
Trustee.

        Delivery of such reports, information and documents to the Trustee is
for informational purposes only and the Trustee's receipt of such shall not
constitute constructive notice of any information contained therein or
determinable from information contained therein, including the Company's
compliance with any of its covenants hereunder (as to which the Trustee is
entitled to rely exclusively on Officers' Certificates).

        SECTION 6.3. COMPLIANCE CERTIFICATES.

        The Company shall deliver to the Trustee, within 90 days after the end
of each fiscal year of the Company (beginning with the fiscal year ending
December 31, 2001), an Officers' Certificate as to the signer's knowledge of the
Company's compliance with all conditions and covenants on its part contained in
this Indenture and stating whether or not the signer knows of any default or
Event of Default. If such signer knows of such a default or Event of Default,
the Officers' Certificate shall describe the default or

                                       38
<PAGE>

Event of Default and the efforts to remedy the same. For the purposes of this
Section 6.3, compliance shall be determined without regard to any grace period
or requirement of notice provided pursuant to the terms of this Indenture.

        SECTION 6.4. FURTHER INSTRUMENTS AND ACTS.

        Upon request of the Trustee, the Company will execute and deliver such
further instruments and do such further acts as may be reasonably necessary or
proper to carry out more effectively the purposes of this Indenture.

        SECTION 6.5. MAINTENANCE OF CORPORATE EXISTENCE.

        Subject to Article 7, the Company will do or cause to be done all things
necessary to preserve and keep in full force and effect its corporate existence.

        SECTION 6.6. RULE 144A INFORMATION REQUIREMENT.

        Within the period prior to the expiration of the holding period
applicable to sales thereof under Rule 144(k) under the Securities Act (or any
successor provision), the Company covenants and agrees that it shall, during any
period in which it is not subject to Section 13 or 15(d) under the Exchange Act,
upon the request of any Holder or beneficial holder of the Securities make
available to such Holder or beneficial holder of Securities or any Common Stock
issued upon conversion thereof which continue to be Restricted Securities in
connection with any sale thereof and any prospective purchaser of Securities or
such Common Stock designated by such Holder or beneficial holder, the
information required pursuant to Rule 144A(d)(4) under the Securities Act or
such Common Stock and it will take such further action as any Holder or
beneficial holder of such Securities or such Common Stock may reasonably
request, all to the extent required from time to time to enable such Holder or
beneficial holder to sell its Securities or Common Stock without registration
under the Securities Act within the limitation of the exemption provided by Rule
144A, as such Rule may be amended from time to time. Upon the request of any
Holder or any beneficial holder of the Securities or such Common Stock, the
Company will deliver to such Holder a written statement as to whether it has
complied with such requirements.

        SECTION 6.7. STAY, EXTENSION AND USURY LAWS.

        The Company covenants (to the extent that it may lawfully do so) that it
shall not at any time insist upon, plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay, extension or usury law or other law
which would prohibit or forgive the Company from paying all or any portion of
the principal of, premium, if any, or interest (including Additional Interest,
if any) on the Securities as contemplated herein, wherever enacted, now or at
any time hereafter in force, or which may affect the covenants or the
performance of this Indenture, and the Company (to the extent it may lawfully do
so) hereby expressly waives all benefit or advantage of any such law and
covenants that it will not, by resort to any such law, hinder, delay or impede
the execution of any power herein granted to the Trustee, but will suffer and
permit the execution of every such power as though no such law had been enacted.

        SECTION 6.8. PAYMENT OF ADDITIONAL INTEREST.

        If Additional Interest is payable by the Company pursuant to the
Registration Rights Agreement, the Company shall deliver to the Trustee a
certificate to that effect stating (i) the amount of such Additional Interest
that is payable and (ii) the date on which such Additional Interest is payable.
Unless and until a Trust Officer of the Trustee receives such a certificate, the
Trustee may assume without inquiry that no such Additional Interest is payable.
If the Company has paid Additional Interest directly

                                       39
<PAGE>

to the Persons entitled to it, the Company shall deliver to the Trustee a
certificate setting forth the particulars of such payment.

                                   ARTICLE 7
              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

        SECTION 7.1. COMPANY MAY CONSOLIDATE, ETC, ONLY ON CERTAIN TERMS.

        The Company shall not consolidate with or merge into any other Person
(in a transaction in which the Company is not the surviving corporation) or
convey, transfer or lease its properties and assets substantially as an entirety
to any Person, unless:

                (1)     in case the Company shall consolidate with or merge into
another Person (in a transaction in which the Company is not the surviving
corporation) or convey, transfer or lease its properties and assets
substantially as an entirety to any Person, the Person formed by such
consolidation or into which the Company is merged or the Person which acquires
by conveyance or transfer, or which leases, the properties and assets of the
Company substantially as an entirety shall be a corporation organized and
validly existing under the laws of the United States of America, any State
thereof or the District of Columbia and shall expressly assume, by an indenture
supplemental hereto, executed and delivered to the Trustee, in form satisfactory
to the Trustee, the due and punctual payment of the principal of and any premium
and interest on all the Securities and the performance or observance of every
covenant of this Indenture on the part of the Company to be performed or
observed and the conversion rights shall be provided for in accordance with
Article 4, by supplemental indenture satisfactory in form to the Trustee,
executed and delivered to the Trustee, by the Person (if other than the Company)
formed by such consolidation or into which the Company shall have been merged or
by the Person which shall have acquired the Company's assets;

                (2)     immediately after giving effect to such transaction, no
Event of Default, and no event which, after notice or lapse of time or both,
would become an Event of Default, shall have happened and be continuing; and

                (3)     the Company has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that such consolidation,
merger, conveyance, transfer or lease and, if a supplemental indenture is
required in connection with such transaction, such supplemental indenture comply
with this Article and that all conditions precedent herein provided for relating
to such transaction have been complied with.

        SECTION 7.2. SUCCESSOR SUBSTITUTED.

        Upon any consolidation of the Company with, or merger of the Company
into, any other Person or any conveyance, transfer or lease of the properties
and assets of the Company substantially as an entirety in accordance with
Section 7.1, the successor Person formed by such consolidation or into which the
Company is merged or to which such conveyance, transfer or lease is made shall
succeed to, and be substituted for, and may exercise every right and power of,
the Company under this Indenture with the same effect as if such successor
Person had been named as the Company herein, and thereafter, except in the case
of a lease, the predecessor Person shall be relieved of all obligations and
covenants under this Indenture and the Securities.

                                       40
<PAGE>

                                   ARTICLE 8
                              DEFAULT AND REMEDIES

        SECTION 8.1. EVENTS OF DEFAULT.

        An "Event of Default" shall occur if:

                (1)     the Company defaults in the payment of any interest or
Additional Interest, if any, payable to all holders of Registrable Securities
(as defined in the Registration Rights Agreement) on any Security when the same
becomes due and payable and the default continues for a period of 30 days,
whether or not such payment shall be prohibited by the provisions of Article 5
hereof;

                (2)     the Company defaults in the payment of any principal of
(including, without limitation, any premium, if any, on) any Security when the
same becomes due and payable (whether at maturity, upon redemption, on a Change
of Control Purchase Date or otherwise), whether or not such payment shall be
prohibited by the provisions of Article 5 hereof;

                (3)     the Company fails to comply with any of its other
agreements contained in the Securities or this Indenture and the default
continues for the period and after the notice specified below;

                (4)     the Company defaults in the payment of the purchase
price of any Security when the same becomes due and payable, whether or not such
payment shall be prohibited by the provisions of Article 5 hereof; or

                (5)     the Company fails to provide a Change in Control
Purchase Notice when required by Section 3.8; or

                (6)     any indebtedness under any bond, debenture, note or
other evidence of indebtedness for money borrowed by the Company or any
Significant Subsidiary (all or substantially all of the outstanding voting
securities of which are owned, directly or indirectly, by the Company) or under
any mortgage, indenture or instrument under which there may be issued or by
which there may be secured or evidenced any indebtedness for money borrowed by
the Company or any Significant Subsidiary (all or substantially all of the
outstanding voting securities of which are owned, directly or indirectly, by the
Company) (an "Instrument") with a principal amount then outstanding in excess of
U.S. $10,000,000, whether such indebtedness now exists or shall hereafter be
created, is not paid at final maturity of the Instrument (either at its stated
maturity or upon acceleration thereof), and such indebtedness is not discharged,
or such acceleration is not rescinded or annulled, within a period of 30 days
after there shall have been given, by registered or certified mail, to the
Company by the Trustee or to the Company and the Trustee by the Holders of at
least 25% in aggregate principal amount of the outstanding Securities a written
notice specifying such default and requiring the Company to cause such
indebtedness to be discharged or cause such default to be cured or waived or
such acceleration to be rescinded or annulled and stating that such notice is a
"Notice of Default" hereunder; or

                (7)     the Company or any Significant Subsidiary, pursuant to
or within the meaning of any Bankruptcy Law:

                        (A)     commences a voluntary case or proceeding;

                        (B)     consents to the entry of an order for relief
                                against it in an involuntary case or proceeding;

                                       41
<PAGE>

                        (C)     consents to the appointment of a Custodian of it
                                or for all or substantially all of its property;
                                or

                        (D)     makes a general assignment for the benefit of
                                its creditors; or

                (8)     a court of competent jurisdiction enters an order or
decree under any Bankruptcy Law that:

                        (A)     is for relief against the Company or any
                                Significant Subsidiary in an involuntary case or
                                proceeding;

                        (B)     appoints a Custodian of the Company or any
                                Significant Subsidiary or for all or
                                substantially all of the property of the Company
                                or any Significant Subsidiary; or

                        (C)     orders the liquidation of the Company or any
                                Significant Subsidiary;

and in each case the order or decree remains unstayed and in effect for 60
consecutive days.

         The term "Bankruptcy Law" means Title 11 of the United States Code (or
any successor thereto) or any similar federal or state law for the relief of
debtors. The term "Custodian" means any receiver, trustee, assignee, liquidator,
sequestrator or similar official under any Bankruptcy Law.

         A default under clause (3) above is not an Event of Default until the
Trustee notifies the Company, or the Holders of at least 25% in aggregate
principal amount of the Securities then outstanding notify the Company and the
Trustee, in writing of the default, and the Company does not cure the default
within 60 days after receipt of such notice. The notice given pursuant to this
Section 8.1 must specify the default, demand that it be remedied and state that
the notice is a "Notice of Default." When any default under this Section 8.1 is
cured, it ceases.

         The Trustee shall not be charged with knowledge of any Event of Default
unless written notice thereof shall have been given to a Trust Officer at the
Corporate Trust Office of the Trustee by the Company, a Paying Agent, any Holder
or any agent of any Holder.

         SECTION 8.2. ACCELERATION.

         If an Event of Default (other than an Event of Default specified in
clause (7) or (8) of Section 8.1) occurs and is continuing, the Trustee may, by
notice to the Company, or the Holders of at least 25% in aggregate principal
amount of the Securities then outstanding may, by notice to the Company and the
Trustee, declare all unpaid principal to the date of acceleration on the
Securities then outstanding (if not then due and payable) to be due and payable
upon any such declaration, and the same shall become and be immediately due and
payable. If an Event of Default specified in clause (7) or (8) of Section 8.1
occurs, all unpaid principal of the Securities then outstanding shall ipso facto
become and be immediately due and payable without any declaration or other act
on the part of the Trustee or any Holder. The Holders of a majority in aggregate
principal amount of the Securities then outstanding by notice to the Trustee may
rescind an acceleration and its consequences if (a) all existing Events of
Default, other than the nonpayment of the principal of the Securities which has
become due solely by such declaration of acceleration, have been cured or
waived; (b) to the extent the payment of such interest is lawful, interest
(calculated at the rate per annum borne by the Securities) on overdue
installments of interest and overdue principal, which has become due otherwise
than by such declaration of acceleration, has been paid; (c) the rescission
would not conflict with any judgment or decree of a court of competent
jurisdiction; and (d) all

                                       42
<PAGE>

payments due to the Trustee and any predecessor Trustee under Section 9.7 have
been made. No such rescission shall affect any subsequent default or impair any
right consequent thereto.

        SECTION 8.3. OTHER REMEDIES.

        If an Event of Default occurs and is continuing, the Trustee may, but
shall not be obligated to, pursue any available remedy by proceeding at law or
in equity to collect the payment of the principal of or interest on the
Securities or to enforce the performance of any provision of the Securities or
this Indenture.

        The Trustee may maintain a proceeding even if it does not possess any of
the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Securityholder in exercising any right or remedy
accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default. No remedy is
exclusive of any other remedy. All available remedies are cumulative to the
extent permitted by law.

        SECTION 8.4. WAIVER OF DEFAULTS AND EVENTS OF DEFAULT.

        Subject to Sections 8.7 and 11.2, the Holders of a majority in aggregate
principal amount of the Securities then outstanding by notice to the Trustee may
waive an existing default or Event of Default and its consequence, except a
default or Event of Default in the payment of the principal of, premium, if any,
or interest on any Security, a failure by the Company to convert any Securities
into Common Stock or any default or Event of Default in respect of any provision
of this Indenture or the Securities which, under Section 11.2, cannot be
modified or amended without the consent of the Holder of each Security affected.
When a default or Event of Default is waived, it is cured and ceases.

        SECTION 8.5. CONTROL BY MAJORITY.

        The Holders of a majority in aggregate principal amount of the
Securities then outstanding may direct the time, method and place of conducting
any proceeding for any remedy available to the Trustee or exercising any trust
or power conferred on it. However, the Trustee may refuse to follow any
direction that conflicts with law or this Indenture, that the Trustee determines
may be unduly prejudicial to the rights of another Holder or the Trustee, or
that may involve the Trustee in personal liability unless the Trustee is offered
indemnity satisfactory to it; provided, however, that the Trustee may take any
other action deemed proper by the Trustee which is not inconsistent with such
direction.

        SECTION 8.6. LIMITATIONS ON SUITS.

        A Holder may not pursue any remedy with respect to this Indenture or the
Securities (except actions for payment of overdue principal or interest or for
the conversion of the Securities pursuant to Article 4) unless:

                (1)     the Holder gives to the Trustee written notice of a
continuing Event of Default;

                (2)     the Holders of at least 25% in aggregate principal
amount of the then outstanding Securities make a written request to the Trustee
to pursue the remedy;

                (3)     such Holder or Holders offer to the Trustee reasonable
indemnity to the Trustee against any loss, liability or expense;

                                       43
<PAGE>

                (4)     the Trustee does not comply with the request within 60
days after receipt of the request and the offer of indemnity; and

                (5)     no direction inconsistent with such written request has
been given to the Trustee during such 60-day period by the Holders of a majority
in aggregate principal amount of the Securities then outstanding.

        A Securityholder may not use this Indenture to prejudice the rights of
another Securityholder or to obtain a preference or priority over such other
Securityholder.

        SECTION 8.7. RIGHTS OF HOLDERS TO RECEIVE PAYMENT AND TO CONVERT.

        Notwithstanding any other provision of this Indenture, the right of any
Holder of a Security to receive payment of the principal of and interest on the
Security, on or after the respective due dates expressed in the Security and
this Indenture, to convert such Security in accordance with Article 4 and to
bring suit for the enforcement of any such payment on or after such respective
dates or the right to convert, is absolute and unconditional and shall not be
impaired or affected without the consent of the Holder.

        SECTION 8.8. COLLECTION SUIT BY TRUSTEE.

        If an Event of Default in the payment of principal or interest specified
in clause (1) or (2) of Section 8.1 occurs and is continuing, the Trustee may
recover judgment in its own name and as trustee of an express trust against the
Company or another obligor on the Securities for the whole amount of principal
and accrued interest remaining unpaid, together with, to the extent that payment
of such interest is lawful, interest on overdue principal and on overdue
installments of interest, in each case at the rate per annum borne by the
Securities and such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

        SECTION 8.9. TRUSTEE MAY FILE PROOFS OF CLAIM.

        The Trustee may file such proofs of claim and other papers or documents
as may be necessary or advisable in order to have the claims of the Trustee
(including any claim for the reasonable compensation, expenses, disbursements
and advances of the Trustee, its agents and counsel) and the Holders allowed in
any judicial proceedings relative to the Company (or any other obligor on the
Securities), its creditors or its property and shall be entitled and empowered
to collect and receive any money or other property payable or deliverable on any
such claims and to distribute the same, and any Custodian in any such judicial
proceeding is hereby authorized by each Holder to make such payments to the
Trustee and, in the event that the Trustee shall consent to the making of such
payments directly to the Holders, to pay to the Trustee any amount due to it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 9.7, and to the extent that such payment of the reasonable compensation,
expenses, disbursements and advances in any such proceedings shall be denied for
any reason, payment of the same shall be secured by a lien on, and shall be paid
out of, any and all distributions, dividends, money, securities and other
property which the Holders may be entitled to receive in such proceedings,
whether in liquidation or under any plan of reorganization or arrangement or
otherwise. Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to, or, on behalf of any Holder, to authorize, accept or
adopt any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any

                                       44
<PAGE>

Holder thereof, or to authorize the Trustee to vote in respect of the claim of
any Holder in any such proceeding.

        SECTION 8.10. PRIORITIES.

        If the Trustee collects any money pursuant to this Article 8, it shall
pay out the money in the following order:

        First, to the Trustee for amounts due under Section 9.7;

        Second, to the holders of Senior Indebtedness to the extent required by
Article 5;

        Third, to Holders for amounts due and unpaid on the Securities for
principal and interest (including Additional Interest, if any), ratably, without
preference or priority of any kind, according to the amounts due and payable on
the Securities for principal and interest (including Additional Interest, if
any), respectively; and

        Fourth, the balance, if any, to the Company.

        The Trustee may fix a record date and payment date for any payment to
Holders pursuant to this Section 8.10.

        SECTION 8.11. UNDERTAKING FOR COSTS.

        In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees and expenses, against any party litigant in the suit, having due
regard to the merits and good faith of the claims or defenses made by the party
litigant. This Section 8.11 does not apply to a suit made by the Trustee, a suit
by a Holder pursuant to Section 8.7, or a suit by Holders of more than 10% in
aggregate principal amount of the Securities then outstanding.

                                   ARTICLE 9
                                    TRUSTEE

        SECTION 9.1. DUTIES OF TRUSTEE.

        (a) If an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture and
use the same degree of care and skill in its exercise as a prudent person would
exercise or use under the circumstances in the conduct of his or her own
affairs.

        (b) Except during the continuance of an Event of Default:

                (1)     the Trustee need perform only those duties as are
specifically set forth in this Indenture and no others; and

                (2)     in the absence of bad faith on its part, the Trustee may
conclusively rely, as to the truth of the statements and the correctness of the
opinions expressed therein, upon certificates or opinions furnished to the
Trustee and conforming to the requirements of this Indenture. The Trustee,
however, shall examine any certificates and opinions which by any provision
hereof are specifically required to be delivered to the Trustee to determine
whether or not they conform to the requirements of this Indenture.

                                       45
<PAGE>

        (c) The Trustee may not be relieved from liability for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

                (1)     this paragraph does not limit the effect of subsection
(b) of this Section 9.1;

                (2)     the Trustee shall not be liable for any error of
judgment made in good faith by a Trust Officer, unless it is proved that the
Trustee was negligent in ascertaining the pertinent facts; and

                (3)     the Trustee shall not be liable with respect to any
action it takes or omits to take in good faith in accordance with a direction
received by it pursuant to Section 8.5.

        (d) No provision of this Indenture shall require the Trustee to expend
or risk its own funds or otherwise incur any financial liability in the
performance of any of its duties hereunder or in the exercise of any of its
rights or powers unless the Trustee shall have received adequate indemnity in
its opinion against potential costs and liabilities incurred by it relating
thereto.

        (e) Every provision of this Indenture that in any way relates to the
Trustee is subject to subsections (a), (b), (c) and (d) of this Section 9.1.

        (f) The Trustee shall not be liable for interest on any money received
by it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law.

        SECTION 9.2. RIGHTS OF TRUSTEE.

        Subject to Section 9.1:

        (a) The Trustee may rely conclusively on any document believed by it to
be genuine and to have been signed or presented by the proper person. The
Trustee need not investigate any fact or matter stated in the document.

        (b) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel, which shall conform to Section
12.4(b). The Trustee shall not be liable for any action it takes or omits to
take in good faith in reliance on such Officers' Certificate or Opinion.

        (c) The Trustee may act through its agents and shall not be responsible
for the misconduct or negligence of any agent appointed with due care.

        (d) The Trustee shall not be liable for any action it takes or omits to
take in good faith which it believes to be authorized or within its rights or
powers.

        (e) The Trustee may consult with counsel of its selection, and the
advice or opinion of such counsel as to matters of law shall be full and
complete authorization and protection in respect of any such action taken,
omitted or suffered by it hereunder in good faith and in accordance with the
advice or opinion of such counsel.

        (f) The Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request or direction of
any of the Holders pursuant to this Indenture, unless such Holders shall have
offered to the Trustee security or indemnity satisfactory to the Trustee against
the costs, expenses and liabilities which might be incurred by it in compliance
with such request or direction.

                                       46
<PAGE>

        (g) The Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture,
note, other evidence of indebtedness or other paper or document, but the
Trustee, in its discretion, may make such further inquiry or investigation into
such facts or matters as it may see fit, and, if the Trustee shall determine to
make such further inquiry or investigation, it shall be entitled to examine the
books, records and premises of the Company, personally or by agent or attorney
at the sole cost of the Company and shall incur no liability or additional
liability of any kind by reason of such inquiry or investigation.

        (h) The Trustee shall not be deemed to have notice of any Default or
Event of Default unless a Trust Officer of the Trustee has actual knowledge
thereof or unless written notice of any event which is in fact such a default is
received by the Trustee at the Corporate Trust Office, and such notice
references the Securities and this Indenture.

        (i) The rights, privileges, protections, immunities and benefits given
to the Trustee, including, without limitation, its right to be indemnified, are
extended to, and shall be enforceable by, the Trustee in each of its capacities
hereunder, and to each agent, custodian and other Person employed to act
hereunder.

        SECTION 9.3. INDIVIDUAL RIGHTS OF TRUSTEE.

        The Trustee in its individual or any other capacity may become the owner
or pledgee of Securities and may otherwise deal with the Company or an Affiliate
of the Company with the same rights it would have if it were not Trustee. Any
Agent may do the same with like rights. However, the Trustee is subject to
Sections 9.10 and 9.11.

        SECTION 9.4. TRUSTEE'S DISCLAIMER.

        The Trustee makes no representation as to the validity or adequacy of
this Indenture or the Securities, it shall not be accountable for the Company's
use of the proceeds from the Securities, and it shall not be responsible for any
statement in the Securities other than its certificate of authentication.

        SECTION 9.5. NOTICE OF DEFAULT OR EVENTS OF DEFAULT.

        If a default or an Event of Default occurs and is continuing and if it
is known to the Trustee, the Trustee shall mail to each Securityholder notice of
the default or Event of Default within 90 days after it occurs. However, the
Trustee may withhold the notice if and so long as a committee of its Trust
Officers in good faith determines that withholding notice is in the interests of
Securityholders, except in the case of a default or an Event of Default in
payment of the principal of or interest on any Security.

        SECTION 9.6. REPORTS BY TRUSTEE TO HOLDERS.

        If such report is required by TIA Section 313, within 60 days after each
May 15, beginning with the May 15 following the date of this Indenture, the
Trustee shall mail to each Securityholder a brief report dated as of such March
15 that complies with TIA Section 313(a). The Trustee also shall comply with TIA
Section 313(b)(2) and (c).

        A copy of each report at the time of its mailing to Securityholders
shall be mailed to the Company and filed with the SEC and each stock exchange,
if any, on which the Securities are listed. The Company shall notify the Trustee
whenever the Securities become listed on any stock exchange or listed or
admitted to trading on any quotation system and any changes in the stock
exchanges or quotation systems on which the Securities are listed or admitted to
trading and of any delisting thereof.

                                       47
<PAGE>

        SECTION 9.7. COMPENSATION AND INDEMNITY.

        The Company shall pay to the Trustee from time to time such compensation
(as agreed to from time to time by the Company and the Trustee in writing) for
its services (which compensation shall not be limited by any provision of law in
regard to the compensation of a trustee of an express trust). The Company shall
reimburse the Trustee upon request for all reasonable disbursements, expenses
and advances incurred or made by it. Such expenses may include the reasonable
compensation, disbursements and expenses of the Trustee's agents and counsel.

        The Company shall indemnify the Trustee or any predecessor Trustee
(which for purposes of this Section 9.7 shall include its officers, directors,
employees and agents) for, and hold it harmless against, any and all loss,
liability or expense including taxes (other than taxes based upon, measured by
or determined by the income of the Trustee), (including reasonable legal fees
and expenses) incurred by it in connection with the acceptance or administration
of its duties under this Indenture or any action or failure to act as authorized
or within the discretion or rights or powers conferred upon the Trustee
hereunder including the reasonable costs and expenses of the Trustee and its
counsel in defending itself against any claim or liability in connection with
the exercise or performance of any of its powers or duties hereunder. The
Trustee shall notify the Company promptly of any claim asserted against the
Trustee for which it may seek indemnity. The Company need not pay for any
settlement without its written consent, which shall not be unreasonably
withheld.

        The Company need not reimburse the Trustee for any expense or indemnify
it against any loss or liability incurred by it resulting from its gross
negligence or bad faith.

        To secure the Company's payment obligations in this Section 9.7, the
Trustee shall have a senior claim to which the Securities are hereby made
subordinate on all money or property held or collected by the Trustee, except
such money or property held in trust to pay the principal of and interest on the
Securities. The obligations of the Company under this Section 9.7 shall survive
the satisfaction and discharge of this Indenture or the resignation or removal
of the Trustee.

        When the Trustee incurs expenses or renders services after an Event of
Default specified in clause (7) or (8) of Section 8.1 occurs, the expenses and
the compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law. The provisions of this Section shall
survive the termination of this Indenture.

        SECTION 9.8. REPLACEMENT OF TRUSTEE.

         The Trustee may resign by so notifying the Company. The Holders of a
majority in aggregate principal amount of the Securities then outstanding may
remove the Trustee by so notifying the Trustee and may, with the Company's
written consent, appoint a successor Trustee. The Company may remove the Trustee
if:

                (1)     the Trustee fails to comply with Section 9.10;

                (2)     the Trustee is adjudged a bankrupt or an insolvent;

                (3)     a receiver or other public officer takes charge of the
                        Trustee or its property; or

                (4)     the Trustee becomes incapable of acting.

                                       48
<PAGE>

         If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. The resignation or removal of a Trustee shall not be effective until a
successor Trustee shall have delivered the written acceptance of its appointment
as described below.

         If a successor Trustee does not take office within 45 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of 10% in principal amount of the Securities then outstanding may
petition any court of competent jurisdiction for the appointment of a successor
Trustee at the expense of the Company.

         If the Trustee fails to comply with Section 9.10, any Holder may
petition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

         A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Immediately after that,
the retiring Trustee shall transfer all property held by it as Trustee to the
successor Trustee and be released from its obligations (exclusive of any
liabilities that the retiring Trustee may have incurred while acting as Trustee)
hereunder, the resignation or removal of the retiring Trustee shall become
effective, and the successor Trustee shall have all the rights, powers and
duties of the Trustee under this Indenture. A successor Trustee shall mail
notice of its succession to each Holder.

         A retiring Trustee shall not be liable for the acts or omissions of any
successor Trustee after its succession.

         Notwithstanding replacement of the Trustee pursuant to this Section
9.8, the Company's obligations under Section 9.7 shall continue for the benefit
of the retiring Trustee.

         SECTION 9.9. SUCCESSOR TRUSTEE BY MERGER, ETC.

         If the Trustee consolidates with, merges or converts into, or transfers
all or substantially all of its corporate trust assets (including the
administration of this Indenture) to, another corporation, the resulting,
surviving or transferee corporation, without any further act, shall be the
successor Trustee, provided such transferee corporation shall qualify and be
eligible under Section 9.10. Such successor Trustee shall promptly mail notice
of its succession to the Company and each Holder.

         SECTION 9.10. ELIGIBILITY; DISQUALIFICATION.

         The Trustee shall always satisfy the requirements of paragraphs (1),
(2) and (5) of TIA Section 310(a). The Trustee (or its parent holding company)
shall have a combined capital and surplus of at least $50,000,000. If at any
time the Trustee shall cease to satisfy any such requirements, it shall resign
immediately in the manner and with the effect specified in this Article 9. The
Trustee shall be subject to the provisions of TIA Section 310(b). Nothing herein
shall prevent the Trustee from filing with the SEC the application referred to
in the penultimate paragraph of TIA Section 310(b).

         SECTION 9.11. PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

         The Trustee shall comply with TIA Section 311(a), excluding any
creditor relationship listed in TIA Section 311(b). A Trustee who has resigned
or been removed shall be subject to TIA Section 311(a) to the extent indicated
therein.

                                       49

<PAGE>

                                   ARTICLE 10
                           SATISFACTION AND DISCHARGE

        SECTION 10.1.   SATISFACTION AND DISCHARGE.

        (a)     This Indenture shall cease to be of further effect, and the
Trustee, on demand of and at the expense of the Company, shall execute proper
instruments acknowledging satisfaction and discharge of this Indenture, when

                (1)     all Securities theretofore authenticated and delivered
(other than (i) Securities which have been destroyed, lost or stolen and which
have been replaced or paid as provided in Section 2.7 and (ii) Securities for
whose payment money has theretofore been deposited in trust and thereafter
repaid to the Company as provided in Section 10.3) have been delivered to the
Trustee for cancellation;

                (2)     the Company has paid or caused to be paid all other sums
payable hereunder by the Company; and

                (3)     the Company has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent herein provided for relating to the satisfaction and discharge of this
Indenture have been complied with.

        Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 9.7 shall survive.

        (b)     The Company may discharge its obligations to pay principal and
interest (including Additional Interest, if any) on the Securities when all
Securities not theretofore delivered to the Trustee for cancellation

                (1)     have become due and payable, or

                (2)     will become due and payable at the Final Maturity Date
within one year, or

                (3)     are to be called for redemption within one year under
arrangements satisfactory to the Trustee for the giving of notice of redemption
by the Trustee in the name, and at the expense, of the Company,

and the Company, in the case of clause (1), (2) or (3) above, has irrevocably,
subject to the limitations set forth in the following sentence, deposited or
caused to be irrevocably, subject to the limitations set forth in the following
sentence, deposited with the Trustee or a Paying Agent (other than the Company
or any of its Affiliates) as trust funds in trust for the purpose cash in an
amount sufficient to pay and discharge the entire indebtedness on such
Securities not theretofore delivered to the Trustee for cancellation, for
principal and interest (including Additional Interest, if any) to the date of
such deposit (in the case of Securities which have become due and payable) or to
the Final Maturity Date or Redemption Date, as the case may be. In the event
that the Company exercises its right to redeem the Securities as provided for in
Article 3 herein, the Company shall have the right to withdraw its funds
previously deposited with the Trustee or Paying Agent pursuant to the
immediately preceding sentence.

                                       50
<PAGE>

        SECTION 10.2.   APPLICATION OF TRUST MONEY.

        Subject to the provisions of Section 10.3, the Trustee or a Paying Agent
shall hold in trust, for the benefit of the Holders, all money deposited with it
pursuant to Section 10.1(b) and shall apply the deposited money in accordance
with this Indenture and the Securities to the payment of the principal of and
interest on the Securities. Money so held in trust shall not be subject to the
subordination provisions of Article 5.

        SECTION 10.3.   REPAYMENT TO COMPANY.

        The Trustee and each Paying Agent shall promptly pay to the Company upon
request any excess money (i) deposited with them pursuant to Section 10.1(b) and
(ii) held by them at any time.

        The Trustee and each Paying Agent shall pay to the Company upon request
any money held by them for the payment of principal or interest that remains
unclaimed for two years after a right to such money has matured; provided,
however, that the Trustee or such Paying Agent, before being required to make
any such payment, may at the expense of the Company cause to be mailed to each
Holder entitled to such money notice that such money remains unclaimed and that
after a date specified therein, which shall be at least 30 days from the date of
such mailing, any unclaimed balance of such money then remaining will be repaid
to the Company. After payment to the Company, Holders entitled to money must
look to the Company for payment as general creditors unless an applicable
abandoned property law designates another person.

        SECTION 10.4.   REINSTATEMENT.

        (a) If the Trustee or any Paying Agent is unable to apply any money in
accordance with Section 10.2 by reason of any legal proceeding or by reason of
any order or judgment of any court or governmental authority enjoining,
restraining or otherwise prohibiting such application, then the Company's
obligations under this Indenture and the Securities shall be revived and
reinstated as though no deposit had occurred pursuant to Section 10.1(b) until
such time as the Trustee or such Paying Agent is permitted to apply all such
money in accordance with Section 10.2; provided, however, that if the Company
has made any payment of the principal of or interest on any Securities because
of the reinstatement of its obligations, the Company shall be subrogated to the
rights of the Holders of such Securities to receive any such payment from the
money held by the Trustee or such Paying Agent.

        (b) If, pursuant to the last sentence of Section 10.1(b), the Company
withdraws its previously deposited funds as a result of its exercise of its
redemption right, the Company's obligations under this Indenture and the
Securities shall be revived and reinstated as though no deposit has occurred
pursuant to Section 10.1.

                                   ARTICLE 11
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

        SECTION 11.1.   WITHOUT CONSENT OF HOLDERS.

        The Company and the Trustee may amend or supplement this Indenture or
the Securities without notice to or consent of any Securityholder:

        (a) to comply with Sections 4.11 and 7.1;

        (b) to cure any ambiguity, defect or inconsistency;

                                       51
<PAGE>

        (c) to make any other change that does not adversely affect the rights
of any Securityholder;

        (d) to comply with the provisions of the TIA;

        (e) to add to the covenants of the Company for the equal and ratable
benefit of the Securityholders or to surrender any right, power or option
conferred upon the Company; or

        (f) to appoint a successor Trustee.

        SECTION 11.2.   WITH CONSENT OF HOLDERS.

        The Company and the Trustee may amend or supplement this Indenture or
the Securities with the written consent of the Holders of at least a majority in
aggregate principal amount of the Securities then outstanding. The Holders of at
least a majority in aggregate principal amount of the Securities then
outstanding may waive compliance in a particular instance by the Company with
any provision of this Indenture or the Securities without notice to any
Securityholder. However, notwithstanding the foregoing but subject to Section
11.4, without the written consent of each Securityholder affected, an amendment,
supplement or waiver, including a waiver pursuant to Section 8.4, may not:

        (a) change the stated maturity of the principal of, or interest on, any
Security;

        (b) reduce the principal amount of, or any premium or interest on, any
Security;

        (c) reduce the amount of principal payable upon acceleration of the
maturity of any Security;

        (d) change the place or currency of payment of principal of, or any
premium or interest on, any Security;

        (e) impair the right to institute suit for the enforcement of any
payment on, or with respect to, any Security;

        (f) modify the provisions with respect to the purchase right of Holders
pursuant to Article 3 upon a Change in Control in a manner adverse to Holders;

        (g) modify the subordination provisions of Article 5 in a manner
materially adverse to the Holders of Securities;

        (h) adversely affect the right of Holders to convert Securities other
than as provided in or under Article 4 of this Indenture;

        (i) reduce the percentage of the aggregate principal amount of the
outstanding Securities whose Holders must consent to a modification or
amendment;

        (j) reduce the percentage of the aggregate principal amount of the
outstanding Securities necessary for the waiver of compliance with certain
provisions of this Indenture or the waiver of certain defaults under this
Indenture; and

        (k) modify any of the provisions of this Section or Section 8.4, except
to increase any such percentage or to provide that certain provisions of this
Indenture cannot be modified or waived without the consent of the Holder of each
outstanding Security affected thereby.

                                       52
<PAGE>

        It shall not be necessary for the consent of the Holders under this
Section 11.2 to approve the particular form of any proposed amendment,
supplement or waiver, but it shall be sufficient if such consent approves the
substance thereof.

        After an amendment, supplement or waiver under this Section 11.2 becomes
effective, the Company shall mail to the Holders affected thereby a notice
briefly describing the amendment, supplement or waiver. Any failure of the
Company to mail such notice, or any defect therein, shall not, however, in any
way impair or affect the validity of any such amendment, supplement or waiver.
An amendment or supplement under this Section 11.2 or under Section 11.1 may not
make any change that adversely affects the rights under Article 5 of any holder
of an issue of Senior Indebtedness unless the holders of that issue, pursuant to
its terms, consent to the change.

        SECTION 11.3.   COMPLIANCE WITH TRUST INDENTURE ACT.

        Every amendment to or supplement of this Indenture or the Securities
shall comply with the TIA as in effect at the date of such amendment or
supplement.

        SECTION 11.4.   REVOCATION AND EFFECT OF CONSENTS.

        Until an amendment, supplement or waiver becomes effective, a consent to
it by a Holder is a continuing consent by the Holder and every subsequent Holder
of a Security or portion of a Security that evidences the same debt as the
consenting Holder's Security, even if notation of the consent is not made on any
Security. However, any such Holder or subsequent Holder may revoke the consent
as to its Security or portion of a Security if the Trustee receives the notice
of revocation before the date the amendment, supplement or waiver becomes
effective.

        After an amendment, supplement or waiver becomes effective, it shall
bind every Securityholder, unless it makes a change described in any of clauses
(a) through (k) of Section 11.2. In that case the amendment, supplement or
waiver shall bind each Holder of a Security who has consented to it and every
subsequent Holder of a Security or portion of a Security that evidences the same
debt as the consenting Holder's Security.

        SECTION 11.5.   NOTATION ON OR EXCHANGE OF SECURITIES.

        If an amendment, supplement or waiver changes the terms of a Security,
the Trustee may require the Holder of the Security to deliver it to the Trustee.
The Trustee may place an appropriate notation on the Security about the changed
terms and return it to the Holder. Alternatively, if the Company or the Trustee
so determines, the Company in exchange for the Security shall issue and the
Trustee shall authenticate a new Security that reflects the changed terms.

        SECTION 11.6.   TRUSTEE TO SIGN AMENDMENTS, ETC.

        The Trustee shall sign any amendment or supplemental indenture
authorized pursuant to this Article 11 if the amendment or supplemental
indenture does not adversely affect the rights, duties, liabilities or
immunities of the Trustee. If it does, the Trustee may, in its sole discretion,
but need not sign it. In signing or refusing to sign such amendment or
supplemental indenture, the Trustee shall be entitled to receive and, subject to
Section 9.1, shall be fully protected in relying upon, an Opinion of Counsel
stating that such amendment or supplemental indenture is authorized or permitted
by this Indenture. The Company may not sign an amendment or supplement indenture
until the Board of Directors approves it.

                                       53
<PAGE>

        SECTION 11.7.   EFFECT OF SUPPLEMENTAL INDENTURES.

        Upon the execution of any supplemental indenture under this Article,
this Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby.

                                   ARTICLE 12
                                  MISCELLANEOUS

        SECTION 12.1.   TRUST INDENTURE ACT CONTROLS.

        If any provision of this Indenture limits, qualifies or conflicts with
the duties imposed by any of Sections 310 to 317, inclusive, of the TIA through
operation of Section 318(c) thereof, such imposed duties shall control.

        SECTION 12.2.   NOTICES.

        Any demand, authorization notice, request, consent or communication
shall be given in writing and delivered in person or mailed by first-class mail,
postage prepaid, addressed as follows or transmitted by facsimile transmission
(confirmed by delivery in person or mail by first-class mail, postage prepaid,
or by guaranteed overnight courier) to the following facsimile numbers:

                If to the Company, to:

                Cephalon, Inc.
                145 Brandywine Parkway
                West Chester, Pennsylvania  19380
                Attention:  Chief Financial Officer
                Facsimile No.: (610) 344-7563

                if to the Trustee, to:

                State Street Bank and Trust Company
                Goodwin Square
                225 Asylum Street
                Hartford, Connecticut 06103
                Attn: Corporate Trust Administration  (Cephalon, Inc. -- 2 1/2%
                      Convertible Subordinated Notes due December 15, 2006)
                Facsimile No.: (860) 244-1889

        Such notices or communications shall be effective when received.

        The Company or the Trustee by notice to the other may designate
additional or different addresses for subsequent notices or communications.

        Any notice or communication mailed to a Securityholder shall be mailed
by first-class mail or delivered by an overnight delivery service to it at its
address shown on the register kept by the Primary Registrar.

                                       54
<PAGE>

        Failure to mail a notice or communication to a Securityholder or any
defect in it shall not affect its sufficiency with respect to other
Securityholders. If a notice or communication to a Securityholder is mailed in
the manner provided above, it is duly given, whether or not the addressee
receives it.

        SECTION 12.3.   COMMUNICATIONS BY HOLDERS WITH OTHER HOLDERS.

        Securityholders may communicate pursuant to TIA Section 312(b) with
other Securityholders with respect to their rights under this Indenture or the
Securities. The Company, the Trustee, the Registrar and any other person shall
have the protection of TIA Section 312(c).

        SECTION 12.4.   CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.

        (a) Upon any request or application by the Company to the Trustee to
take any action under this Indenture, the Company shall furnish to the Trustee
at the request of the Trustee:

                (1)     an Officers' Certificate stating that, in the opinion of
the signers, all conditions precedent (including any covenants, compliance with
which constitutes a condition precedent), if any, provided for in this Indenture
relating to the proposed action have been complied with; and

                (2)     an Opinion of Counsel stating that, in the opinion of
such counsel, all such conditions precedent (including any covenants, compliance
with which constitutes a condition precedent) have been complied with.

        (b) Each Officers' Certificate and Opinion of Counsel with respect to
compliance with a condition or covenant provided for in this Indenture shall
include:

                (1)     a statement that the person making such certificate or
opinion has read such covenant or condition;

                (2)     a brief statement as to the nature and scope of the
examination or investigation upon which the statements or opinions contained in
such certificate or opinion are based;

                (3)     a statement that, in the opinion of such person, he or
she has made such examination or investigation as is necessary to enable him or
her to express an informed opinion as to whether or not such covenant or
condition has been complied with; and

                (4)     a statement as to whether or not, in the opinion of such
person, such condition or covenant has been complied with;

provided however, that with respect to matters of fact an Opinion of Counsel may
rely on an Officers' Certificate or certificates of public officials.

        SECTION 12.5.   RECORD DATE FOR VOTE OR CONSENT OF SECURITYHOLDERS.

        The Company (or, in the event deposits have been made pursuant to
Section 10.1, the Trustee) may set a record date for purposes of determining the
identity of Holders entitled to vote or consent to any action by vote or consent
authorized or permitted under this Indenture, which record date shall not be
more than thirty (30) days prior to the date of the commencement of solicitation
of such action. Notwithstanding the provisions of Section 11.4, if a record date
is fixed, those persons who were Holders of Securities at the close of business
on such record date (or their duly designated proxies), and only those

                                       55
<PAGE>

persons, shall be entitled to take such action by vote or consent or to revoke
any vote or consent previously given, whether or not such persons continue to be
Holders after such record date.

        SECTION 12.6.   RULES BY TRUSTEE, PAYING AGENT, REGISTRAR AND CONVERSION
                        AGENT.

        The Trustee may make reasonable rules (not inconsistent with the terms
of this Indenture) for action by or at a meeting of Holders. Any Registrar,
Paying Agent or Conversion Agent may make reasonable rules for its functions.

        SECTION 12.7.   LEGAL HOLIDAYS.

        A "Legal Holiday" is a Saturday, Sunday or a day on which state or
federally chartered banking institutions in New York, New York and the state in
which the Corporate Trust Office is located are not required to be open. If a
payment date is a Legal Holiday, payment shall be made on the next succeeding
day that is not a Legal Holiday, and no interest shall accrue for the
intervening period. If a regular record date is a Legal Holiday, the record date
shall not be affected.

        SECTION 12.8.   GOVERNING LAW.

        This Indenture and the Securities shall be governed by, and construed in
accordance with, the laws of the State of New York, without regard to principles
of conflicts of laws.

        SECTION 12.9.   NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.

        This Indenture may not be used to interpret another indenture, loan or
debt agreement of the Company or a Subsidiary of the Company. Any such
indenture, loan or debt agreement may not be used to interpret this Indenture.

        SECTION 12.10.  NO RECOURSE AGAINST OTHERS.

        All liability described in paragraph 18 of the Securities of any
director, officer, employee or shareholder, as such, of the Company is waived
and released.

        SECTION 12.11.  SUCCESSORS.

        All agreements of the Company in this Indenture and the Securities shall
bind its successor. All agreements of the Trustee in this Indenture shall bind
its successor.

        SECTION 12.12.  MULTIPLE COUNTERPARTS.

        The parties may sign multiple counterparts of this Indenture. Each
signed counterpart shall be deemed an original, but all of them together
represent the same agreement.

        SECTION 12.13.  SEPARABILITY.

        In case any provisions in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

                                       56
<PAGE>

        SECTION 12.14.  TABLE OF CONTENTS, HEADINGS, ETC.

        The table of contents, cross-reference sheet and headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part hereof, and shall in no way
modify or restrict any of the terms or provisions hereof.

                            [SIGNATURE PAGE FOLLOWS]

                                       57
<PAGE>

        IN WITNESS WHEREOF, the parties hereto have hereunto set their hands as
of the date and year first above written.

                                         CEPHALON, INC.

                                         By: /s/ J. KEVIN BUCHI
                                            ------------------------------------
                                         Name: J. Kevin Buchi
                                         Title: Senior VP and CFO

                                         STATE STREET BANK AND TRUST COMPANY,
                                          as Trustee

                                         By: /s/ PHILIP G. KANE, JR.
                                            ------------------------------------
                                         Name:  Philip G. Kane, Jr.
                                         Title: Vice President

<PAGE>

                                    EXHIBIT A
                           [FORM OF FACE OF SECURITY]

        [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A
GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND
IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS
EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE
DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE
INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR
SECURITIES IN DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A
WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE
DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE
DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH
SUCCESSOR DEPOSITARY.](1)

        [THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF
1933 (THE "SECURITIES ACT"), AND THIS SECURITY AND THE SHARES OF COMMON STOCK
ISSUABLE UPON CONVERSION THEREOF MAY NOT BE OFFERED, SOLD OR OTHERWISE
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION
THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF
THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5
OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.](2)

        THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT
(A) THIS SECURITY AND THE SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION
THEREOF MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) IN
THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (II) OUTSIDE THE UNITED
STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE
SECURITIES ACT, (III) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE
SECURITIES ACT

------------------------
        (1) These paragraphs should be included only if the Security is a Global
Security.

        (2) These paragraphs to be included only if the Security is a Restricted
Security.

                                      A-1
<PAGE>

PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (IV) PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (I) THROUGH
(IV) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE
UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED
TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS
REFERRED TO IN (A) ABOVE.](2)

        [THE HOLDER OF THIS SECURITY IS ENTITLED TO THE BENEFITS OF A
REGISTRATION RIGHTS AGREEMENT (AS SUCH TERM IS DEFINED IN THE INDENTURE REFERRED
TO ON THE REVERSE HEREOF) AND, BY ITS ACCEPTANCE HEREOF, AGREES TO BE BOUND BY
AND TO COMPLY WITH THE PROVISIONS OF SUCH REGISTRATION RIGHTS AGREEMENT.](2)

------------------------
        (2) These paragraphs to be included only if the Security is a Restricted
Security.

                                      A-2
<PAGE>

                                 CEPHALON, INC.

        CUSIP: __________                                             A-______

           2 1/2% CONVERTIBLE SUBORDINATED NOTES DUE DECEMBER 15, 2006

        Cephalon, Inc., a Delaware corporation (the "Company", which term shall
include any successor corporation under the Indenture referred to on the reverse
hereof), promises to pay to___________ _________________, or registered assigns,
the principal sum of _____________________________ Dollars ($__________) on
December 15, 2006 [or such greater or lesser amount as is indicated on the
Schedule of Exchanges of Notes on the other side of this Note].(3)

        Interest Payment Dates: June 15 and December 15

        Record Dates: June 1 and December 1

        This Note is convertible as specified on the other side of this Note.
Additional provisions of this Note are set forth on the other side of this Note.

                             SIGNATURE PAGE FOLLOWS

------------------------
        (3) This phrase should be included only if the Security is a Global
Security.

                                      A-3
<PAGE>

        IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed.

                                           CEPHALON, INC.

                                           By:
                                              ----------------------------------
                                           Name:
                                           Title:

Trustee's Certificate of Authentication: This is one of the
Securities referred to in the within-mentioned Indenture.

STATE STREET BANK AND TRUST COMPANY,
  as Trustee

By:
   ----------------------------------------
   Authorized Signatory

                                      A-4
<PAGE>

                       [FORM OF REVERSE SIDE OF SECURITY]

                                 CEPHALON, INC.
           2 1/2% CONVERTIBLE SUBORDINATED NOTES DUE DECEMBER 15, 2006

1.      INTEREST

        Cephalon, Inc., a Delaware corporation (the "Company", which term shall
include any successor corporation under the Indenture hereinafter referred to),
promises to pay interest on the principal amount of this Note at the rate of 2
1/2% per annum. The Company shall pay interest semiannually on June 15 and
December 15 of each year, commencing June 15, 2002. Interest on the Notes shall
accrue from the most recent date to which interest has been paid or, if no
interest has been paid, from December 11, 2001; provided, however, that if there
is not an existing default in the payment of interest and if this Note is
authenticated between a record date referred to on the face hereof and the next
succeeding interest payment date, interest shall accrue from such interest
payment date. Interest will be computed on the basis of a 360-day year of twelve
30-day months. Any reference herein to interest accrued or payable as of any
date shall include any Additional Interest accrued or payable on such date as
provided in the Registration Rights Agreement.

2.      METHOD OF PAYMENT

        The Company shall pay interest on this Note (except defaulted interest)
to the person who is the Holder of this Note at the close of business on June 1
or December 1, as the case may be, next preceding the related interest payment
date. The Holder must surrender this Note to a Paying Agent to collect payment
of principal. The Company will pay principal and interest in money of the United
States that at the time of payment is legal tender for payment of public and
private debts. The Company may, however, pay principal and interest in respect
of any Certificated Security by check or wire payable in such money; provided,
however, that a Holder with an aggregate principal amount in excess of
$2,000,000 will be paid by wire transfer in immediately available funds at the
election of such Holder if such Holder has provided wire transfer instructions
to the Company. The Company may mail an interest check to the Holder's
registered address. Notwithstanding the foregoing, so long as this Note is
registered in the name of a Depositary or its nominee, all payments hereon shall
be made by wire transfer of immediately available funds to the account of the
Depositary or its nominee.

3.      PAYING AGENT, REGISTRAR AND CONVERSION AGENT

        Initially, State Street Bank and Trust Company (the "Trustee", which
term shall include any successor trustee under the Indenture hereinafter
referred to) will act as Paying Agent, Registrar and Conversion Agent. The
Company may change any Paying Agent, Registrar or Conversion Agent without
notice to the Holder. The Company or any of its Subsidiaries may, subject to
certain limitations set forth in the Indenture, act as Paying Agent or
Registrar.

4.      INDENTURE, LIMITATIONS

        This Note is one of a duly authorized issue of Securities of the Company
designated as its 2 1/2% Convertible Subordinated Notes due December 11, 2006
(the "Notes"), issued under an Indenture dated as of December 11, 2001 (together
with any supplemental indentures thereto, the "Indenture"), between the Company
and the Trustee. The terms of this Note include those stated in the Indenture
and those required by or made part of the Indenture by reference to the Trust
Indenture Act of 1939, as amended, as

                                      A-5
<PAGE>

in effect on the date of the Indenture. This Note is subject to all such terms,
and the Holder of this Note is referred to the Indenture and said Act for a
statement of them.

        The Notes are subordinated unsecured obligations of the Company limited
to $600,000,000 aggregate principal amount. The Indenture does not limit other
debt of the Company, secured or unsecured, including Senior Indebtedness.

5.      OPTIONAL REDEMPTION

        The Notes are subject to redemption, at any time on or after December
20, 2004, as a whole or from time to time in part, at the election of the
Company. The Redemption Price is 100% of the principal amount of the Notes to be
redeemed, together with accrued and unpaid interest up to but not including the
Redemption Date; provided that if the Redemption Date falls after an interest
payment record date and on or before an interest payment date, then the interest
will be payable to the Holders in whose names the Notes are registered at the
close of business on the relevant interest payment record dates.

        No sinking fund is provided for the Notes.

6.      NOTICE OF REDEMPTION

        Notice of redemption will be mailed by first-class mail at least 20 days
but not more than 60 days before the Redemption Date to each Holder of Notes to
be redeemed at its registered address. Notes in denominations larger than $1,000
may be redeemed in part, but only in whole multiples of $1,000. On and after the
Redemption Date, subject to the deposit with the Paying Agent of funds
sufficient to pay the Redemption Price plus accrued interest, if any, accrued
to, but excluding, the Redemption Date, interest shall cease to accrue on Notes
or portions of them called for redemption.

7.      PURCHASE OF NOTES AT OPTION OF HOLDER UPON A CHANGE IN CONTROL

        At the option of the Holder and subject to the terms and conditions of
the Indenture, the Company shall become obligated to purchase all or any part
specified by the Holder (so long as the principal amount of such part is $1,000
or an integral multiple of $1,000 in excess thereof) of the Notes held by such
Holder on the date that is 30 Business Days after the occurrence of a Change in
Control, at a purchase price equal to 100% of the principal amount thereof
together with accrued interest up to, but excluding, the Change in Control
Purchase Date. The Holder shall have the right to withdraw any Change in Control
Purchase Notice (in whole or in a portion thereof that is $1,000 or an integral
multiple of $1,000 in excess thereof) at any time prior to the close of business
on the Business Day next preceding the Change in Control Purchase Date by
delivering a written notice of withdrawal to the Paying Agent in accordance with
the terms of the Indenture.

8.      CONVERSION

        A Holder of a Note may convert the principal amount of such Note (or any
portion thereof equal to $1,000 or any integral multiple of $1,000 in excess
thereof) into shares of Common Stock at any time prior to the close of business
on December 15, 2006; provided, however, that if the Note is called for
redemption or subject to purchase upon a Change in Control, the conversion right
will terminate at the close of business on the Business Day immediately
preceding the Redemption Date or the Change in Control Purchase Date, as the
case may be, for such Note or such earlier date as the Holder presents such Note
for redemption or purchase (unless the Company shall default in making the
redemption payment or Change in Control Purchase Price, as the case may be, when
due, in which case the conversion right shall

                                      A-6
<PAGE>

terminate at the close of business on the date such default is cured and such
Note is redeemed or purchased).

        The initial Conversion Price is $81.00 per share, subject to adjustment
under certain circumstances as provided in the Indenture. The number of shares
of Common Stock issuable upon conversion of a Note is determined by dividing the
principal amount of the Note or portion thereof converted by the Conversion
Price in effect on the Conversion Date. No fractional shares will be issued upon
conversion; in lieu thereof, an amount will be paid in cash based upon the
Closing Price (as defined in the Indenture) of the Common Stock on the Trading
Day immediately prior to the Conversion Date.

        To convert a Note, a Holder must (a) complete and manually sign the
conversion notice set forth below and deliver such notice to a Conversion Agent,
(b) surrender the Note to a Conversion Agent, (c) furnish appropriate
endorsements and transfer documents if required by a Registrar or a Conversion
Agent, and (d) pay any transfer or similar tax, if required. Notes so
surrendered for conversion (in whole or in part) during the period from the
close of business on any regular record date to the opening of business on the
next succeeding interest payment date (excluding Notes or portions thereof
called for redemption or subject to purchase upon a Change in Control on a
Redemption Date or Change in Control Purchase Date, as the case may be, during
the period beginning at the close of business on a regular record date and
ending at the opening of business on the first Business Day after the next
succeeding interest payment date, or if such interest payment date is not a
Business Day, the second such Business Day) shall also be accompanied by payment
in funds acceptable to the Company of an amount equal to the interest payable on
such interest payment date on the principal amount of such Note then being
converted, and such interest shall be payable to such registered Holder
notwithstanding the conversion of such Note, subject to the provisions of this
Indenture relating to the payment of defaulted interest by the Company. If the
Company defaults in the payment of interest payable on such interest payment
date, the Company shall promptly repay such funds to such Holder. A Holder may
convert a portion of a Note equal to $1,000 or any integral multiple thereof.

        A Note in respect of which a Holder had delivered a Change in Control
Purchase Notice exercising the option of such Holder to require the Company to
purchase such Note may be converted only if the Change in Control Purchase
Notice is withdrawn in accordance with the terms of the Indenture.

9.      CONVERSION ARRANGEMENT ON CALL FOR REDEMPTION

        Any Notes called for redemption, unless surrendered for conversion
before the close of business on the Business Day immediately preceding the
Redemption Date, may be deemed to be purchased from the Holders of such Notes at
an amount not less than the Redemption Price, together with accrued interest, if
any, to, but not including, the Redemption Date, by one or more investment
bankers or other purchasers who may agree with the Company to purchase such
Notes from the Holders, to convert them into Common Stock of the Company and to
make payment for such Notes to the Paying Agent in trust for such Holders.

10.     SUBORDINATION

        The indebtedness evidenced by the Notes is, to the extent and in the
manner provided in the Indenture, subordinate and junior in right of payment to
the prior payment in full of all Senior Indebtedness of the Company. Any Holder
by accepting this Note agrees to and shall be bound by such subordination
provisions and authorizes the Trustee to give them effect. In addition to all
other rights of Senior Indebtedness described in the Indenture, the Senior
Indebtedness shall continue to be Senior Indebtedness and entitled to the
benefits of the subordination provisions irrespective of any amendment,

                                      A-7
<PAGE>

modification or waiver of any terms of any instrument relating to the Senior
Indebtedness or any extension or renewal of the Senior Indebtedness.

11.     DENOMINATIONS, TRANSFER, EXCHANGE

        The Notes are in registered form, without coupons, in denominations of
$1,000 and integral multiples of $1,000. A Holder may register the transfer of
or exchange Notes in accordance with the Indenture. The Registrar may require a
Holder, among other things, to furnish appropriate endorsements and transfer
documents and to pay any taxes or other governmental charges that may be imposed
in relation thereto by law or permitted by the Indenture.

12.     PERSONS DEEMED OWNERS

        The Holder of a Note may be treated as the owner of it for all purposes.

13.     UNCLAIMED MONEY

        If money for the payment of principal or interest remains unclaimed for
two years, the Trustee or Paying Agent will pay the money back to the Company at
its written request, subject to applicable unclaimed property law. After that,
Holders entitled to money must look to the Company for payment as general
creditors unless an applicable abandoned property law designates another person.

14.     AMENDMENT, SUPPLEMENT AND WAIVER

        Subject to certain exceptions, the Indenture or the Notes may be amended
or supplemented with the consent of the Holders of at least a majority in
aggregate principal amount of the Notes then outstanding, and an existing
default or Event of Default and its consequence or compliance with any provision
of the Indenture or the Notes may be waived in a particular instance with the
consent of the Holders of a majority in aggregate principal amount of the Notes
then outstanding. Without the consent of or notice to any Holder, the Company
and the Trustee may amend or supplement the Indenture or the Notes to, among
other things, cure any ambiguity, defect or inconsistency or make any other
change that does not adversely affect the rights of any Holder.

15.     SUCCESSOR ENTITY

        When a successor corporation assumes all the obligations of its
predecessor under the Notes and the Indenture in accordance with the terms and
conditions of the Indenture, the predecessor corporation (except in certain
circumstances specified in the Indenture) be released from those obligations.

16.     DEFAULTS AND REMEDIES

        Under the Indenture, an Event of Default includes: (i) default for 30
days in payment of any interest or Additional Interest on any Notes; (ii)
default in payment of any principal (including, without limitation, any premium,
if any) on the Notes when due; (iii) failure by the Company for 60 days after
notice to it to comply with any of its other agreements contained in the
Indenture or the Notes; (iv) default in the payment of certain indebtedness of
the Company or a Significant Subsidiary and (v) certain events of bankruptcy,
insolvency or reorganization of the Company or any Significant Subsidiary. If an
Event of Default (other than as a result of certain events of bankruptcy,
insolvency or reorganization of the Company) occurs and is continuing, the
Trustee or the Holders of at least 25% in aggregate principal amount of the
Notes then outstanding may declare all unpaid principal to the date of
acceleration on the Notes then outstanding to be due and payable immediately,
all as and to the extent provided in the

                                      A-8
<PAGE>

Indenture. If an Event of Default occurs as a result of certain events of
bankruptcy, insolvency or reorganization of the Company, unpaid principal of the
Notes then outstanding shall become due and payable immediately without any
declaration or other act on the part of the Trustee or any Holder, all as and to
the extent provided in the Indenture. Holders may not enforce the Indenture or
the Notes except as provided in the Indenture. The Trustee may require indemnity
satisfactory to it before it enforces the Indenture or the Notes. Subject to
certain limitations, Holders of a majority in aggregate principal amount of the
Notes then outstanding may direct the Trustee in its exercise of any trust or
power. The Trustee may withhold from Holders notice of any continuing default
(except a default in payment of principal or interest) if it determines that
withholding notice is in their interests. The Company is required to file
periodic reports with the Trustee as to the absence of default.

17.     TRUSTEE DEALINGS WITH THE COMPANY

        State Street Bank and Trust Company, the Trustee under the Indenture, in
its individual or any other capacity, may make loans to, accept deposits from
and perform services for the Company or an Affiliate of the Company, and may
otherwise deal with the Company or an Affiliate of the Company, as if it were
not the Trustee.

18.     NO RECOURSE AGAINST OTHERS

        A director, officer, employee or shareholder, as such, of the Company
shall not have any liability for any obligations of the Company under the Notes
or the Indenture nor for any claim based on, in respect of or by reason of such
obligations or their creation. The Holder of this Note by accepting this Note
waives and releases all such liability. The waiver and release are part of the
consideration for the issuance of this Note.

19.     AUTHENTICATION

        This Note shall not be valid until the Trustee or an authenticating
agent manually signs the certificate of authentication on the other side of this
Note.

20.     ABBREVIATIONS AND DEFINITIONS

        Customary abbreviations may be used in the name of the Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (= joint tenants with right of survivorship and not as
tenants in common), CUST (= Custodian) and UGMA (= Uniform Gifts to Minors Act).

        All terms defined in the Indenture and used in this Note but not
specifically defined herein are defined in the Indenture and are used herein as
so defined.

21.     INDENTURE TO CONTROL; GOVERNING LAW

        In the case of any conflict between the provisions of this Note and the
Indenture, the provisions of the Indenture shall control. This Note shall be
governed by, and construed in accordance with, the laws of the State of New
York, without regard to principals of conflicts of law.

        The Company will furnish to any Holder, upon written request and without
charge, a copy of the Indenture. Requests may be made to: Cephalon, Inc., 145
Brandywine Parkway, West Chester, PA 19380, (610) 344-0200, Attention: General
Counsel.

                                      A-9
<PAGE>

                                 ASSIGNMENT FORM

        To assign this Note, fill in the form below:

        I or we assign and transfer this Note to

        ------------------------------------------------------------------------
                      (Insert assignee's soc. sec. or tax I.D. no.)

        ------------------------------------------------------------------------

        ------------------------------------------------------------------------

        ------------------------------------------------------------------------

        ------------------------------------------------------------------------
                  (Print or type assignee's name, address and zip code)

        and irrevocably appoint

        ------------------------------------------------------------------------

        agent to transfer this Note on the books of the Company. The agent may
substitute another to act for him or her.

                                       Your Signature:

Date:
     ------------------------------    -----------------------------------------
                                       (Sign exactly as your name appears on the
                                       other side of this Note)

        *Signature guaranteed by:

By:
   --------------------------------

        *       The signature must be guaranteed by an institution which is a
                member of one of the following recognized signature guaranty
                programs: (i) the Securities Transfer Agent Medallion Program
                (STAMP); (ii) the New York Stock Exchange Medallion Program
                (MSP); (iii) the Stock Exchange Medallion Program (SEMP); or
                (iv) such other guaranty program acceptable to the Trustee.

                                      A-10
<PAGE>

                                CONVERSION NOTICE

       To convert this Note into Common Stock of the Company, check the box: [ ]

       To convert only part of this Note, state the principal amount to be
converted (must be $1,000 or a integral multiple of $1,000): $____________.

       If you want the stock certificate made out in another person's name, fill
in the form below:

       ------------------------------------------------------------------------
                      (Insert assignee's soc. sec. or tax I.D. no.)

       ------------------------------------------------------------------------

       ------------------------------------------------------------------------

       ------------------------------------------------------------------------

       ------------------------------------------------------------------------
                  (Print or type assignee's name, address and zip code)

                                       Your Signature:

Date:
     ------------------------------    -----------------------------------------
                                       (Sign exactly as your name appears on the
                                       other side of this Note)

        *Signature guaranteed by:

By:
   --------------------------------

        *       The signature must be guaranteed by an institution which is a
                member of one of the following recognized signature guaranty
                programs: (i) the Securities Transfer Agent Medallion Program
                (STAMP); (ii) the New York Stock Exchange Medallion Program
                (MSP); (iii) the Stock Exchange Medallion Program (SEMP); or
                (iv) such other guaranty program acceptable to the Trustee.

                                      A-11
<PAGE>

                           OPTION TO ELECT REPURCHASE
                            UPON A CHANGE OF CONTROL

To:     Cephalon, Inc.

        The undersigned registered owner of this Security hereby irrevocably
acknowledges receipt of a notice from Cephalon, Inc. (the "Company") as to the
occurrence of a Change in Control with respect to the Company and requests and
instructs the Company to redeem the entire principal amount of this Security, or
the portion thereof (which is $1,000 or an integral multiple thereof) below
designated, in accordance with the terms of the Indenture referred to in this
Security at the Change in Control Purchase Price, together with accrued interest
to, but excluding, such date, to the registered Holder hereof.

Dated: ____________
                                       -----------------------------------------

                                       -----------------------------------------

                                       Signature(s) must be guaranteed by a
                                       qualified guarantor institution with
                                       membership in an approved signature
                                       guarantee program pursuant to
                                       Rule 17Ad-15 under the Securities
                                       Exchange Act of 1934.

                                       -----------------------------------------
                                       Signature Guaranty

Principal amount to be redeemed
(in an integral multiple of $1,000, if less than all):

----------------------------------

NOTICE: The signature to the foregoing Election must correspond to the Name as
written upon the face of this Security in every particular, without alteration
or any change whatsoever.

                                      A-12
<PAGE>

                       SCHEDULE OF EXCHANGES OF NOTES(4)

        The following exchanges, redemptions, repurchases or conversions of a
part of this global Note have been made:

<TABLE>
<CAPTION>
     PRINCIPAL AMOUNT
    OF THIS GLOBAL NOTE           AUTHORIZED                                        AMOUNT OF
      FOLLOWING SUCH             SIGNATORY OF       AMOUNT OF DECREASE IN          INCREASE IN
       DECREASE DATE              SECURITIES           PRINCIPAL AMOUNT          PRINCIPAL AMOUNT
 OF EXCHANGE (OR INCREASE)        CUSTODIAN          OF THIS GLOBAL NOTE       OF THIS GLOBAL NOTE
---------------------------     --------------     -----------------------    ---------------------
<S>                             <C>                <C>                        <C>

</TABLE>

------------------------
        (4) This schedule should be included only if the Security is a Global
Security.

                                      A-13
<PAGE>

                                    EXHIBIT B
                  CERTIFICATE TO BE DELIVERED UPON EXCHANGE OR
                    REGISTRATION OF RESTRICTED SECURITIES(5)

Re:     2 1/2% Convertible Subordinated Notes due December 15, 2006 (the
        "Notes") of Cephalon, Inc.

        This certificate relates to $_______ principal amount of Notes owned in
(check applicable box):

        [ ]  book-entry or  [ ]  definitive form by ___________________ (the
                                 "Transferor").

        The Transferor has requested a Registrar or the Trustee to exchange or
register the transfer of such Notes.

        In connection with such request and in respect of each such Note, the
Transferor does hereby certify that the Transferor is familiar with transfer
restrictions relating to the Notes as provided in Section 2.12 of the Indenture
dated as of December 11, 2001 between Cephalon, Inc. and State Street Bank and
Trust Company, as trustee (the "Indenture"), and the transfer of such Note is
being made pursuant to an effective registration statement under the Securities
Act of 1933, as amended (the "Securities Act") (check applicable box) or the
transfer or exchange, as the case may be, of such Note does not require
registration under the Securities Act because (check applicable box):

        [ ]     Such Note is being transferred pursuant to an effective
                registration statement under the Securities Act.

        [ ]     Such Note is being acquired for the Transferor's own account,
                without transfer.

        [ ]     Such Note is being transferred to the Company or a Subsidiary
                (as defined in the Indenture) of the Company.

        [ ]     Such Note is being transferred to a person the Transferor
                reasonably believes is a "qualified institutional buyer" (as
                defined in Rule 144A or any successor provision thereto ("Rule
                144A") under the Securities Act) that is purchasing for its own
                account or for the account of a "qualified institutional buyer",
                in each case to whom notice has been given that the transfer is
                being made in reliance on such Rule 144A, and in each case in
                reliance on Rule 144A.

        [ ]     Such Note is being transferred pursuant to and in compliance
                with an exemption from the registration requirements under the
                Securities Act in accordance with Rule 144 (or any successor
                thereto) ("Rule 144") under the Securities Act.

        Such Note is being transferred pursuant to and in compliance with an
exemption from the registration requirements of the Securities Act (other than
an exemption referred to above) and as a result of which such Note will, upon
such transfer, cease to be a "restricted security" within the meaning of Rule
144 under the Securities Act.

------------------------
        (5) This certificate should only be included if this Security is a
Restricted Security.

                                      B-1
<PAGE>

        The Transferor acknowledges and agrees that, if the transferee will hold
any such Notes in the form of beneficial interests in a global Note which is a
"restricted security" within the meaning of Rule 144 under the Securities Act,
then such transfer can only be made pursuant to Rule 144A under the Securities
Act and such transferee must be a "qualified institutional buyer" (as defined in
Rule 144A).

Date:
     ------------------------------          -----------------------------------
                                             (Insert Name of Transferor)

                                      B-2<PAGE>
                                                                EXHIBIT 4.2

                                  $500,000,000

                                 CEPHALON, INC.

           2 1/2% CONVERTIBLE SUBORDINATED NOTES DUE DECEMBER 15, 2006

                          REGISTRATION RIGHTS AGREEMENT

                                                         December 11, 2001

CREDIT SUISSE FIRST BOSTON CORPORATION,
 As Representative of the Several Purchasers,
   Eleven Madison Avenue
    New York, New York 10010-3629

Ladies and Gentlemen:

Cephalon, Inc., a Delaware corporation (the "COMPANY"), proposes to issue and
sell to Credit Suisse First Boston Corporation (the "LEAD PURCHASER"), Robertson
Stephens, Inc., CIBC World Markets Corp., SG Cowen Securities Corporation, UBS
Warburg LLC, U.S. Bancorp Piper Jaffray Inc., Adams, Harkness & Hill, Inc. and
Banc of America Securities LLC (collectively, the "INITIAL PURCHASERS"), upon
the terms set forth in a purchase agreement dated as of December 5, 2001 (the
"PURCHASE AGREEMENT"), $500,000,000 aggregate principal amount (plus an
additional $100,000,000 principal amount pursuant to an option granted
thereunder) of its 2 1/2% Convertible Subordinated Notes due December 15, 2006
(the "INITIAL SECURITIES"). The Initial Securities will be convertible into
shares of common stock, par value $0.01 per share, of the Company (the "COMMON
STOCK") at the conversion price set forth in the Offering Circular dated
December 5, 2001 (the "OFFERING CIRCULAR"). The Initial Securities will be
issued pursuant to an Indenture, dated as of December 11, 2001 (the
"INDENTURE"), among the Company and State Street Bank and Trust Company, as
trustee (the "TRUSTEE"). As a condition to the Initial Purchasers' obligation to
purchase the Initial Securities under the Purchase Agreement, the Company agrees
with the Initial Purchasers, for the benefit of (i) the Initial Purchasers and
(ii) the holders of the Initial Securities and the Common Stock issuable upon
conversion of the Initial Securities (collectively, the "SECURITIES") from time
to time until such time as such Securities have been sold pursuant to a Shelf
Registration Statement (as defined below) (each of the foregoing a "HOLDER" and
collectively the "HOLDERS"), as follows:

        1. Shelf Registration. (a) The Company shall, at its cost, prepare and,
as promptly as practicable (but in no event more than 90 days after so required
or requested pursuant to this Section 1) file with the Securities and Exchange
Commission (the "COMMISSION") and thereafter use all commercially reasonable
efforts to cause to be declared effective as soon as practicable,

                                       1
<PAGE>

but not later than 180 days after the latest date of original issuance of the
Initial Securities, a registration statement on Form S-3 (the "SHELF
REGISTRATION STATEMENT") relating to the offer and sale of the Transfer
Restricted Securities (as defined in Section 5 hereof) by the Holders thereof
from time to time in accordance with the methods of distribution set forth in
the Shelf Registration Statement and Rule 415 under the Securities Act of 1933,
as amended (the "SECURITIES ACT") (hereinafter, the "SHELF REGISTRATION");
provided, however, that no Holder (other than an Initial Purchaser) shall be
entitled to have the Securities held by it covered by such Shelf Registration
Statement unless such Holder agrees in writing to be bound by all the provisions
of this Agreement applicable to such Holder.

        (b) The Company shall use all commercially reasonable efforts to keep
the Shelf Registration Statement continuously effective in order to permit the
prospectus included therein (the "PROSPECTUS") to be lawfully delivered by the
Holders of the relevant Securities, for a period of two years (or for such
longer period if extended pursuant to Section 2(h) below) from the date of its
effectiveness or such shorter period that will terminate when all the Securities
covered by the Shelf Registration Statement (i) have been sold pursuant thereto
or (ii) are no longer restricted securities (as defined in Rule 144(k) under the
Securities Act, or any successor rule thereof), assuming for this purpose that
the Holders thereof are not affiliates of the Company (in any such case, such
period being called the "SHELF REGISTRATION PERIOD"). The Company shall be
deemed not to have used all commercially reasonable efforts to keep the Shelf
Registration Statement effective during the requisite period if it voluntarily
takes any action that would result in Holders of Securities covered thereby not
being able to offer and sell such Securities during that period, unless such
action is (i) required by applicable law or (ii) taken by the Company in good
faith and contemplated by Section 2(b)(v) below, and the Company thereafter
complies with the requirements of Section 2(h).

        (c) Notwithstanding any other provisions of this Agreement to the
contrary, the Company shall cause the Shelf Registration Statement and the
Prospectus and any amendment or supplement thereto, as of the effective date of
the Shelf Registration Statement, amendment or supplement, (i) to comply in all
material respects with the applicable requirements of the Securities Act and the
rules and regulations of the Commission and (ii) not to contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they were made, not misleading.

        2. Registration Procedures. In connection with the Shelf Registration
contemplated by Section 1 hereof, the following provisions shall apply:

        (a) The Company shall (i) furnish to the Lead Purchaser, (A) prior to
the filing thereof with the Commission, a copy of the Shelf Registration
Statement and each amendment thereof, (B) within one day following the filing
thereof with the Commission, each supplement, if any, to the prospectus included
in the Shelf Registration Statement, and (C) in the event that an Initial
Purchaser (with respect to any portion of an unsold allotment from the original
offering) is participating in the Shelf Registration Statement, shall use its
best efforts to reflect in the Shelf Registration Statement and each amendment
thereof, when so filed with the Commission, such comments as such Initial
Purchaser reasonably may propose; and (ii) include the names of the

                                       2
<PAGE>

Holders who propose to sell Securities pursuant to the Shelf Registration
Statement as selling securityholders and who have completed and returned to the
Company the questionnaire included as Annex A to the Offering Circular (a
"Completed Questionnaire").

        (b) The Company shall give written notice to the Initial Purchasers and,
in the case of clauses (ii)-(vi) hereof, the Holders of the Securities from whom
the Company has received a Completed Questionnaire (which notice pursuant to
clauses (iii)-(vi) hereof shall be accompanied by an instruction to suspend the
use of the Prospectus until the requisite changes have been made):

                (i) when the Shelf Registration Statement or any amendment
        thereto has been filed with the Commission;

                (ii) and when the Shelf Registration Statement or any
        post-effective amendment thereto has become effective;

                (iii) of any request by the Commission for amendments or
        supplements to the Shelf Registration Statement or the prospectus
        included therein or for additional information;

                (iv) of the issuance by the Commission of any stop order
        suspending the effectiveness of the Shelf Registration Statement or the
        initiation of any proceedings for that purpose;

                (v) of the receipt by the Company or its legal counsel of any
        notification with respect to the suspension of the qualification of the
        Securities for sale in any jurisdiction or the initiation or threatening
        of any proceeding for such purpose; and

                (vi) of the happening of any event that requires the Company to
        make changes in the Shelf Registration Statement or the Prospectus in
        order that the Shelf Registration Statement or the Prospectus does not
        contain an untrue statement of a material fact nor omit to state a
        material fact required to be stated therein or necessary to make the
        statements therein (in the case of the Prospectus, in light of the
        circumstances under which they were made) not misleading.

        (c) The Company shall make every reasonable effort to obtain the
withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Shelf Registration Statement.

        (d) The Company shall, upon request, furnish to each Holder of
Securities included as a selling securityholder in the Shelf Registration,
without charge, at least one copy of the Shelf Registration Statement and any
post-effective amendment thereto, including financial statements and schedules,
and, if the Holder so requests in writing, all exhibits thereto (including
those, if any, incorporated by reference).

                                       3
<PAGE>

        (e) The Company shall, during the Shelf Registration Period, deliver to
each Holder of Securities included as a selling securityholder in the Shelf
Registration, without charge, as many copies of the Prospectus (including each
preliminary prospectus) included in the Shelf Registration Statement and any
amendment or supplement thereto as such person may reasonably request. The
Company consents, subject to the provisions of this Agreement, to the use of the
Prospectus or any amendment or supplement thereto by each of the selling Holders
of the Securities in connection with the offering and sale of the Securities
covered by the Prospectus, or any amendment or supplement thereto, included in
the Shelf Registration Statement.

        (f) Prior to any public offering of the Securities pursuant to the Shelf
Registration Statement, the Company shall register or qualify or cooperate with
the Holders of the Securities included therein and their respective counsel in
connection with the registration or qualification of the Securities for offer
and sale under the securities or "blue sky" laws of such states of the United
States as any Holder of the Securities reasonably requests in writing and do any
and all other acts or things necessary or advisable to enable the offer and sale
in such jurisdictions of the Securities covered by such Registration Statement;
provided, however, that the Company shall not be required to (i) qualify
generally to do business in any jurisdiction where it is not then so qualified
or (ii) take any action which would subject it to general service of process or
to taxation in any jurisdiction where it is not then so subject.

        (g) The Company shall cooperate with the Holders of the Securities to
facilitate the timely preparation and delivery of certificates representing the
Securities to be sold pursuant to any Registration Statement free of any
restrictive legends and in such denominations and registered in such names as
the Holders may request, and with respect to the Initial Securities in
accordance with the Indenture, a reasonable period of time prior to sales of the
Securities pursuant to the Shelf Registration Statement.

        (h) Upon the occurrence of any event contemplated by paragraphs (ii)
through (v) of Section 2(b) above during the period for which the Company is
required to maintain an effective Shelf Registration Statement, the Company
shall promptly prepare and file a post-effective amendment to the Shelf
Registration Statement or an amendment or supplement to the Prospectus and any
other required document so that, as thereafter delivered to Holders or
purchasers of the Securities, the Prospectus will not contain an untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading. If the Company
notifies the Initial Purchasers and the Holders in accordance with paragraphs
(ii) through (v) of Section 2(b) above to suspend the use of the Prospectus
until the requisite changes to the Prospectus have been made, then the Initial
Purchasers and the Holders shall suspend use of such prospectus, and the period
of effectiveness of the Shelf Registration Statement provided for in Section
1(b) above shall be extended by the number of days from and including the date
of the giving of such notice to and including the date when the Initial
Purchasers and the Holders shall have received such amended or supplemented
prospectus pursuant to this Section 2(h).

                                       4
<PAGE>

        (i) Not later than the effective date of the Shelf Registration
Statement, the Company will obtain CUSIP numbers for the Initial Securities and
the Common Stock registered under the Shelf Registration Statement (and provide
such CUSIP numbers to the Depository Trust Company), and provide the Trustee
with printed certificates for the Initial Securities, in a form eligible for
deposit with The Depository Trust Company.

        (j) The Company will comply with all rules and regulations of the
Commission to the extent and so long as they are applicable to the Shelf
Registration and will make generally available to its security holders (or
otherwise provide in accordance with Section 11(a) of the Securities Act), an
earnings statement satisfying the provisions of Section 11(a) of the Securities
Act, no later than 45 days after the end of a 12-month period (or 90 days, if
such period is a fiscal year) beginning with the first month of the Company's
first fiscal quarter commencing after the effective date of the Shelf
Registration Statement, which statement shall cover such 12-month period.

        (k) The Company shall cause the Indenture to be qualified under the
Trust Indenture Act of 1939, as amended (the "TRUST INDENTURE ACT"), in a timely
manner and containing such changes, if any, as shall be necessary for such
qualification. In the event that such qualification would require the
appointment of a new trustee under the Indenture, the Company shall appoint a
new trustee thereunder pursuant to the applicable provisions of the Indenture.

        (l) The Company may require each Holder of Securities to be sold
pursuant to the Shelf Registration Statement to furnish to the Company such
information regarding the Holder and the distribution of the Securities as the
Company may from time to time reasonably require for inclusion in the Shelf
Registration Statement, and the Company may exclude from such registration the
Securities of any Holder that unreasonably fails to furnish such information
within a reasonable time after receiving such request.

        (m) The Company shall enter into such customary agreements (including,
if requested, an underwriting agreement in customary form) and take all such
other actions, if any, as any Holder shall reasonably request in order to
facilitate the disposition of the Securities pursuant to the Shelf Registration;
provided, however, that the Company is required to facilitate no more than two
underwritten offerings.

        (n) The Company shall (i) make reasonably available for inspection by
the Holders, any underwriter participating in any disposition pursuant to the
Shelf Registration Statement and any attorney, accountant or other agent
retained by the Holders or any such underwriter, all relevant financial and
other records, pertinent corporate documents and properties of the Company and
(ii) cause the Company's officers, directors, employees, accountants and
auditors to supply all relevant information reasonably requested by the Holders
or any such underwriter, attorney, accountant or agent in connection with the
Shelf Registration Statement, in each case, as shall be reasonably necessary to
enable such persons, to conduct a reasonable investigation within the meaning of
Section 11 of the Securities Act; provided, however, that the foregoing
inspection and information gathering shall be coordinated on behalf of the
Initial Purchasers by you and on behalf of the other parties, by one counsel
designated by and on behalf of such other parties as described in Section 3
hereof.

                                       5
<PAGE>

        (o) The Company, if requested by any Holder of Securities covered by the
Shelf Registration Statement, shall (i) use all commercially reasonable efforts
to cause (A) its counsel to deliver an opinion and updates thereof relating to
the Securities (in form, scope, and substance which is reasonably satisfactory
to the managing underwriters, if any) addressed to such Holders and the managing
underwriters, if any, thereof, and dated, in the case of the initial opinion,
the effective date of such Shelf Registration Statement, and (B) its independent
public accountants to provide to the selling Holders of the applicable
Securities and any underwriter therefor a comfort letter in customary form and
covering matters of the type customarily covered in comfort letters in
connection with primary underwritten offerings, subject to receipt of
appropriate documentation as contemplated, and only if permitted, by Statement
of Auditing Standards No. 72, and (ii) cause its officers to execute and deliver
all customary documents and certificates and updates thereof requested by any
underwriters of the Securities.

        (p) In the event that any broker-dealer registered under the Exchange
Act shall underwrite any Securities or participate as a member of an
underwriting syndicate or selling group or "assist in the distribution" (within
the meaning of the Conduct Rules (the "RULES") of the National Association of
Securities Dealers, Inc. ("NASD")) thereof, whether as a Holder of such
Securities or as an underwriter, a placement or sales agent or a broker or
dealer in respect thereof, or otherwise, the Company will assist such
broker-dealer in complying with the requirements of such Rules, including,
without limitation, by (i) if such Rules, including Rule 2720, shall so require,
engaging a "qualified independent underwriter" (as defined in Rule 2720) to
participate in the preparation of the Shelf Registration Statement relating to
such Securities, to exercise usual standards of due diligence in respect thereto
and, if any portion of the offering contemplated by such Registration Statement
is an underwritten offering or is made through a placement or sales agent, to
recommend the yield of such Securities, (ii) indemnifying any such qualified
independent underwriter to the extent of the indemnification of underwriters
provided in Section 5 hereof and (iii) providing such information to such
broker-dealer as may be required in order for such broker-dealer to comply with
the requirements of the Rules.

        (q) The Company shall use commercially reasonable efforts to take all
other steps necessary to effect the registration of the Securities covered by a
Registration Statement contemplated hereby.

        (r) The Company may suspend use of the Prospectus for a period not to
exceed an aggregate of 45 days in any 90-day period or an aggregate of 90 days
in any twelve-month period in the event of:

                (i) the issuance by the SEC of a stop order suspending the
        effectiveness of the Shelf Registration Statement or the initiation of
        proceedings with respect to the Shelf Registration Statement under
        Section 8(d) or 8(e) of the Securities Act,

                (ii) the occurrence of any event or the existence of any fact as
        a result of which any Registration Statement shall contain any untrue
        statement of a material fact or omit to state any material fact required
        to be stated therein or necessary to make the statements therein not
        misleading, or any Prospectus shall contain any untrue statement

                                       6
<PAGE>

        of a material fact or omit to state any material fact required to be
        stated therein or necessary to make the statements therein, in the light
        of the circumstances under which they were made, not misleading, or

                (iii) the occurrence or existence of any pending corporate
        development that, in the discretion of the Company, makes it appropriate
        to suspend the availability of the Shelf Registration Statement and the
        related Prospectus.

        In the event of a suspension pursuant to clause (ii) above, subject to
the next sentence, the Company shall as promptly as practicable prepare and file
a post-effective amendment to such Registration Statement or a supplement to the
related Prospectus or any document incorporated therein by reference or file any
other required document that would be incorporated by reference into such
Registration Statement and Prospectus so that such Registration Statement does
not contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary to make the statements
therein not misleading, and such Prospectus does not contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein, in the light of the
circumstances under which they were made, not misleading, as thereafter
delivered to the purchasers of the Securities being sold thereunder, and, in the
case of a post-effective amendment to a Registration Statement, subject to the
next sentence, use all commercially reasonable efforts to cause it to be
declared effective as promptly as is reasonably practicable, and give notice to
the Holders that the availability of the Shelf Registration Statement is
suspended and, upon receipt of any such notice, each Holder agrees not to sell
any Securities pursuant to the Registration Statement until such Holder's
receipt of copies of the supplemented or amended Prospectus provided for above,
or until it is advised in writing by the Company that the Prospectus may be
used, and has received copies of any additional or supplemental filings that are
incorporated or deemed incorporated by reference in such Prospectus.

        The Company will use all commercially reasonable efforts to ensure that
the use of the Prospectus may be resumed (x) in the case of clause (i) above, as
promptly as is practicable, (y) in the case of clause (ii) above, as soon as, in
the sole judgment of the Company, public disclosure of such material event would
not be prejudicial to or contrary to the interests of the Company or, if
necessary to avoid unreasonable burden or expense, as soon as reasonably
practicable thereafter and (z) in the case of clause (iii) above, as soon as, in
the discretion of the Company, such suspension is no longer appropriate.

        3. Registration Expenses. (a) All expenses incident to the Company's
performance of and compliance with this Agreement will be borne by the Company,
regardless of whether a Registration Statement is ever filed or becomes
effective, including without limitation;

                (i) all registration and filing fees and expenses;

                (ii) all fees and expenses of compliance with federal securities
        and state "blue sky" or securities laws;

                                       7
<PAGE>

                (iii) all expenses of printing (including printing certificates
        for the Securities to be issued and printing of Prospectuses), messenger
        and delivery services and telephone;

                (iv) all fees and disbursements of counsel for the Company;

                (v) all application and filing fees in connection with listing
        the Securities on a national securities exchange or automated quotation
        system pursuant to the requirements hereof; and

                (vi) all fees and disbursements of independent certified public
        accountants of the Company (including the expenses of any special audit
        and comfort letters required by or incident to such performance).

The Company will bear its internal expenses (including, without limitation, all
salaries and expenses of its officers and employees performing legal or
accounting duties), the expenses of any annual audit and the fees and expenses
of any person, including special experts, retained by the Company.

        (b) In connection with the Shelf Registration Statement required by this
Agreement, the Company will reimburse the Initial Purchasers and the Holders of
Securities covered by the Shelf Registration Statement, for the reasonable fees
and disbursements of not more than one counsel, designated by the Holders of a
majority in principal amount of the Securities covered by the Shelf Registration
Statement (provided that Holders of Common Stock issued upon the conversion of
the Initial Securities shall be deemed to be Holders of the aggregate principal
amount of Initial Securities from which such Common Stock was converted) to act
as counsel for the Holders in connection therewith.

        4. Indemnification. (a) The Company agrees to indemnify and hold
harmless each Holder and each person, if any, who controls such Holder within
the meaning of the Securities Act or the Securities Exchange Act of 1934, as
amended (the "EXCHANGE ACT") (each Holder, and such controlling persons are
referred to collectively as the "INDEMNIFIED PARTIES") from and against any
losses, claims, damages or liabilities, joint or several, or any actions in
respect thereof (including, but not limited to, any losses, claims, damages,
liabilities or actions relating to purchases and sales of the Securities) to
which each Indemnified Party may become subject under the Securities Act, the
Exchange Act or otherwise, insofar as such losses, claims, damages, liabilities
or actions arise out of or are based upon any untrue statement or alleged untrue
statement of a material fact contained in the Shelf Registration Statement or
prospectus including any document incorporated by reference therein, or in any
amendment or supplement thereto or in any preliminary prospectus relating to the
Shelf Registration, or arise out of, or are based upon, the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, and shall reimburse, as
incurred, the Indemnified Parties for any legal or other expenses reasonably
incurred by them in connection with investigating or defending any such loss,
claim, damage, liability or action in respect thereof; provided, however, that
(i) the Company shall not be liable in any such case to the extent that such
loss, claim, damage or liability arises out of or is based upon any untrue
statement or alleged untrue statement or omission or alleged omission made in
the Shelf

                                       8
<PAGE>

Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to the Shelf Registration in reliance
upon and in conformity with written information pertaining to such Holder and
furnished to the Company by or on behalf of such Holder specifically for
inclusion therein (which shall include, without limitation, the information
provided to the Company by such Indemnified Party in the Completed
Questionnaire) and (ii) with respect to any untrue statement or omission or
alleged untrue statement or omission made in any preliminary prospectus relating
to the Shelf Registration Statement, the indemnity agreement contained in this
subsection (a) shall not inure to the benefit of any Holder from whom the person
asserting any such losses, claims, damages or liabilities purchased the
Securities concerned, to the extent that a prospectus relating to such
Securities was required to be delivered by such Holder under the Securities Act
in connection with such purchase and any such loss, claim, damage or liability
of such Holder results from the fact that there was not sent or given to such
person, at or prior to the written confirmation of the sale of such Securities
to such person, a copy of the final prospectus if the Company had previously
furnished copies thereof to such Holder; provided further, however, that this
indemnity agreement will be in addition to any liability which the Company may
otherwise have to such Indemnified Party. The Company also shall indemnify
underwriters, their officers and directors and each person who controls such
underwriters within the meaning of the Securities Act or the Exchange Act to the
same extent as provided above with respect to the indemnification of the Holders
of the Securities if requested by such Holders.

        (b) Each Holder, severally and not jointly, will indemnify and hold
harmless the Company, its officers and directors and each person, if any, who
controls the Company within the meaning of the Securities Act or the Exchange
Act from and against any losses, claims, damages or liabilities or any actions
in respect thereof, to which the Company or any such controlling person may
become subject under the Securities Act, the Exchange Act or otherwise, insofar
as such losses, claims, damages, liabilities or actions arise out of or are
based upon any untrue statement or alleged untrue statement of a material fact
contained in the Shelf Registration Statement or prospectus or in any amendment
or supplement thereto or in any preliminary prospectus relating to the Shelf
Registration, or arise out of or are based upon the omission or alleged omission
to state therein a material fact necessary to make the statements therein not
misleading, but in each case only to the extent that the untrue statement or
omission or alleged untrue statement or omission was made in reliance upon and
in conformity with written information pertaining to such Holder and furnished
to the Company by or on behalf of such Holder specifically for inclusion therein
(which shall include, without limitation, the information provided to the
Company by such Indemnified Party in the Completed Questionnaire); and, subject
to the limitation set forth immediately preceding this clause, shall reimburse,
as incurred, the Company for any legal or other expenses reasonably incurred by
the Company or any such controlling person in connection with investigating or
defending any loss, claim, damage, liability or action in respect thereof. This
indemnity agreement will be in addition to any liability which such Holder may
otherwise have to the Company or any of its controlling persons.

        (c) Promptly after receipt by an indemnified party under this Section 4
of notice of the commencement of any action or proceeding (including a
governmental investigation), such indemnified party will, if a claim in respect
thereof is to be made against the indemnifying party under this Section 4,
notify the indemnifying party of the commencement thereof; but the

                                       9
<PAGE>

omission so to notify the indemnifying party will not, in any event, relieve the
indemnifying party from any obligations to any indemnified party other than the
indemnification obligation provided in paragraph (a) or (b) above. In case any
such action is brought against any indemnified party, and it notifies the
indemnifying party of the commencement thereof, the indemnifying party will be
entitled to participate therein and, to the extent that it may wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel reasonably satisfactory to such indemnified party (who
shall not, except with the consent of the indemnified party, be counsel to the
indemnifying party), and after notice from the indemnifying party to such
indemnified party of its election so to assume the defense thereof the
indemnifying party will not be liable to such indemnified party under this
Section 4 for any legal or other expenses, other than reasonable costs of
investigation, subsequently incurred by such indemnified party in connection
with the defense thereof. No indemnifying party shall, without the prior written
consent of the indemnified party, effect any settlement of any pending or
threatened action in respect of which any indemnified party is or could have
been a party and indemnity could have been sought hereunder by such indemnified
party unless such settlement (i) includes an unconditional release of such
indemnified party from all liability on any claims that are the subject matter
of such action, and (ii) does not include a statement as to or an admission of
fault, culpability or a failure to act by or on behalf of any indemnified party.

        (d) If the indemnification provided for in this Section 4 is unavailable
or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to in subsection (a) or (b)
above in such proportion as is appropriate to reflect the relative fault of the
indemnifying party or parties on the one hand and the indemnified party on the
other in connection with the statements or omissions that resulted in such
losses, claims, damages or liabilities (or actions in respect thereof) as well
as any other relevant equitable considerations. The relative fault of the
parties shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
on the one hand or such Holder or such other indemnified party, as the case may
be, on the other, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The amount paid by an indemnified party as a result of the losses, claims,
damages or liabilities referred to in the first sentence of this subsection (d)
shall be deemed to include any legal or other expenses reasonably incurred by
such indemnified party in connection with investigating or defending any action
or claim which is the subject of this subsection (d). Notwithstanding any other
provision of this Section 4(d), the Holders shall not be required to contribute
any amount in excess of the amount by which the net proceeds received by such
Holders from the sale of the Securities pursuant to the Shelf Registration
Statement exceeds the amount of damages which such Holders have otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission. No person guilty of fraudulent misrepresentation (within
the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. For purposes of this paragraph (d), each person, if any, who
controls such indemnified party within the meaning of the Securities Act or the
Exchange Act shall have the same rights to contribution as such

                                       10
<PAGE>

indemnified party and each person, if any, who controls the Company within the
meaning of the Securities Act or the Exchange Act shall have the same rights to
contribution as the Company.

        (e) The agreements contained in this Section 4 shall survive the sale of
the Securities pursuant to the Shelf Registration Statement and shall remain in
full force and effect, regardless of any termination or cancellation of this
Agreement or any investigation made by or on behalf of any indemnified party.

        5. Additional Interest Under Certain Circumstances. (a) Additional
interest (the "ADDITIONAL INTEREST") with respect to the Initial Securities
shall be assessed as follows if any of the following events occur (each such
event in clauses (i) through (iv) below being herein called a "REGISTRATION
DEFAULT"):

                (i) the Shelf Registration Statement has not been filed with the
        Commission by the 90th day after the first date of original issuance of
        the Initial Securities;

                (ii) the Shelf Registration Statement has not been declared
        effective by the Commission by the 180th day after the first date of
        original issue of the Initial Securities; or

                (iii) after the Shelf Registration Statement has been declared
        effective, such Shelf Registration ceases to be effective or usable in
        connection with resales of the Initial Securities and the Common Stock
        issuable upon conversion of the Initial Securities in accordance with
        and during the periods specified in this Agreement and (A) the Company
        does not cure the Shelf Registration Statement within five business days
        by post-effective amendment or report filed pursuant to the Exchange Act
        or (B) if applicable, the Company does not terminate the suspension
        period described in Section 2(s) above by the 45th or 90th day, as the
        case may be.

Each of the foregoing will constitute a Registration Default whatever the reason
for any such event and whether it is voluntary or involuntary or is beyond the
control of the Company or pursuant to operation of law or as a result of any
action or inaction by the Commission.

        Additional Interest shall accrue on the Initial Securities and the
underlying Common Stock over and above the interest set forth in the title of
the Initial Securities from and including the date on which any such
Registration Default shall occur to but excluding the date on which all such
Registration Defaults have been cured, at a rate of 0.50% per annum, or an
equivalent amount for any Common Stock issued upon conversion of the Initial
Securities (the "ADDITIONAL INTEREST RATE").

        (b) A Registration Default referred to in Section 5(a)(iii) hereof shall
be deemed not to have occurred and be continuing in relation to the Shelf
Registration Statement or the related prospectus if (i) such Registration
Default has occurred solely as a result of (x) the filing of a post-effective
amendment to the Shelf Registration Statement to incorporate annual audited
financial information with respect to the Company where such post-effective
amendment is not yet effective and needs to be declared effective to permit
Holders to use the related prospectus or

                                       11
<PAGE>

(y) other material events, with respect to the Company that would need to be
described in such Shelf Registration Statement or the related prospectus and
(ii) in the case of clause (y), the Company is proceeding promptly and in good
faith to amend or supplement the Shelf Registration Statement and related
prospectus to describe such events as required by paragraph 2(h) hereof;
provided, however, that in any case if such Registration Default occurs for a
continuous period in excess of 30 days, Additional Interest shall be payable in
accordance with the above paragraph from the day such Registration Default
occurs until such Registration Default is cured.

        (c) Any amounts of Additional Interest due pursuant to Section 5(a) will
be payable in cash on the regular interest payment dates with respect to the
Initial Securities. The amount of Additional Interest will be determined by
multiplying the applicable Additional Interest Rate by the principal amount of
the Initial Securities, further multiplied by a fraction, the numerator of which
is the number of days such Additional Interest Rate was applicable during such
period (determined on the basis of a 360-day year comprised of twelve 30-day
months), and the denominator of which is 360.

        (d) "TRANSFER RESTRICTED SECURITIES" means each Security until (i) the
date on which such Security has been effectively registered under the Securities
Act and disposed of in accordance with the Shelf Registration Statement or (ii)
the date on which such Security is distributed to the public pursuant to Rule
144 under the Securities Act or is saleable pursuant to Rule 144(k) under the
Securities Act.

        6. Rules 144 and 144A. The Company shall use its best efforts to file
the reports required to be filed by it under the Securities Act and the Exchange
Act in a timely manner and, if at any time the Company is not required to file
such reports, it will, upon the request of any Holder, make publicly available
other information so long as necessary to permit sales of their securities
pursuant to Rules 144 and 144A. The Company covenants that it will take such
further action as any Holder may reasonably request in writing, all to the
extent required from time to time to enable such Holder to sell Transfer
Restricted Securities without registration under the Securities Act within the
limitation of the exemptions provided by Rules 144 and 144A (including the
requirements of Rule 144A(d)(4)). The Company will provide a copy of this
Agreement to prospective purchasers of Securities identified to the Company by
the Initial Purchasers upon written request. Upon the written request of any
Holder, the Company shall deliver to such Holder a written statement as to
whether it has complied with such requirements. Notwithstanding the foregoing,
nothing in this Section 6 shall be deemed to require the Company to register any
of its securities pursuant to the Exchange Act.

        7. Underwritten Registrations. If any of the Transfer Restricted
Securities covered by the Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("MANAGING UNDERWRITERS") will be selected by
the holders of a majority in aggregate principal amount of such Transfer
Restricted Securities to be included in such offering (provided that holders of
Common Stock issued upon conversion of the Initial Securities shall not be
deemed holders of Common Stock, but shall be deemed to be holders of the
aggregate principal amount of Initial Securities from which such Common Stock
was converted.

                                       12
<PAGE>

        No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Transfer Restricted
Securities on the basis reasonably provided in any underwriting arrangements
approved by the persons entitled hereunder to approve such arrangements and (ii)
completes and executes all questionnaires, powers of attorney, indemnities,
underwriting agreements and other documents reasonably required under the terms
of such underwriting arrangements.

        8. Miscellaneous.

        (a) Remedies. The Company acknowledges and agrees that any failure by
the Company to comply with its obligations under Section 1 hereof may result in
material irreparable injury to the Initial Purchasers or the Holders for which
there is no adequate remedy at law, that it will not be possible to measure
damages for such injuries precisely and that, in the event of any such failure,
the Initial Purchasers or any Holder may obtain such relief as may be required
to specifically enforce the Company's obligations under Sections 1 hereof. The
Company further agrees to waive the defense in any action for specific
performance that a remedy at law would be adequate.

        (b) No Inconsistent Agreements. The Company will not on or after the
date of this Agreement enter into any agreement with respect to its securities
that is inconsistent with the rights granted to the Holders in this Agreement or
otherwise conflicts with the provisions hereof. The rights granted to the
Holders hereunder do not in any way conflict with and are not inconsistent with
the rights granted to the holders of the Company's securities under any
agreement in effect on the date hereof.

        (c) Amendments and Waivers. The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Company and the written
consent of the holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents
(provided that holders of Common Stock issued upon conversion of Initial
Securities shall not be deemed holders of Common Stock, but shall be deemed to
be holders of the aggregate principal amount of Initial Securities from which
such Common Stock was converted). Without the consent of the Holder of each
Initial Security, however, no modification may change the provisions relating to
the payment of Additional Interest.

        (d) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

                (1) if to a Holder of the Securities, at the most current
        address given by such Holder to the Company.

                (2) if to the Initial Purchasers;

                        c/o Credit Suisse First Boston Corporation

                                       13
<PAGE>

                            Eleven Madison Avenue
                            New York, NY 10010-3629
                            Fax No.: (212) 325-8278
                            Attention: Transactions Advisory Group

        with a copy to:

                        Shearman & Sterling
                        599 Lexington Avenue
                        New York, NY 10022-6069
                        Fax No.: (212) 848-7179
                        Attn: Michael J. Schiavone, Esq.

                (3)     if to the Company, at its address as follows:

                        Cephalon, Inc.
                        145 Brandywine Parkway
                        West Chester, PA 19380
                        Fax No.: (610) 344-7563
                        Attn: General Counsel

        with a copy to:

                        Morgan, Lewis & Bockius LLP
                        1701 Market Street
                        Philadelphia, PA 19103
                        Fax No.: (215) 963-5299
                        Attn: Richard A. Silfen, Esq.

        All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery.

        (e) Third Party Beneficiaries. The Holders shall be third party
beneficiaries to the agreements made hereunder between the Company, on the one
hand, and the Initial Purchasers, on the other hand, and shall have the right to
enforce such agreements directly to the extent they may deem such enforcement
necessary or advisable to protect their rights or the rights of Holders
hereunder.

        (f) Successors and Assigns. This Agreement shall be binding upon the
Company and its successors and assigns.

                                       14
<PAGE>

        (g) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

        (h) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

        (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

        By the execution and delivery of this Agreement, the Company submits to
the nonexclusive jurisdiction of any federal or state court in the State of New
York.

        (j) Severability. If any one or more of the provisions contained herein,
or the application thereof in any circumstance, is held invalid, illegal or
unenforceable, the validity, legality and enforceability of any such provision
in every other respect and of the remaining provisions contained herein shall
not be affected or impaired thereby.

        (k) Securities Held by the Company. Whenever the consent or approval of
Holders of a specified percentage of principal amount of Securities is required
hereunder, Securities held by the Company or its affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

                                       15
<PAGE>

        If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Company a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
among the several Initial Purchasers and the Company in accordance with its
terms.

                                 Very truly yours,

                                 Cephalon, Inc.

                                 by        /s/ J. KEVIN BUCHI
                                   ---------------------------------------------
                                        Name:  J. Kevin Buchi
                                        Title: Senior VP and CFO

The foregoing Registration Rights
Agreement is hereby confirmed
and accepted as of the date first
above written.

CREDIT SUISSE FIRST BOSTON CORPORATION
ROBERTSON STEPHENS, INC.
CIBC WORLD MARKETS CORP.
SG COWEN SECURITIES CORPORATION
UBS WARBURG LLC
U.S. BANCORP PIPER JAFFRAY INC.
ADAMS, HARKNESS & Hill, INC.
BANC OF AMERICA SECURITIES LLC

BY: CREDIT SUISSE FIRST BOSTON CORPORATION

        by         /s/ PETE A. MEYERS
          ---------------------------------------------
                Name:  Pete A. Meyers
                Title: Director

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