Document:

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                                                                     EXHIBIT 4.1

FORM OF 3 7/8% CONVERTIBLE PROMISSORY NOTE DUE MARCH 29, 2007

<TABLE>
<CAPTION>
Note No.     Holder:                      Amount of Note:    Permitted Assigns ([sec]14(d)(1)):
--------     -------                      ---------------    ----------------------------------
   <S>       <C>                            <C>              <C>
   A-1       Anthem Investors, LLC          $33,000,000      HBK Main Street Investments, L.P.

   A-2       Anthem Investors, LLC          $22,000,000      Delta Opportunity Fund (Institutional), LLC
</TABLE>

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THIS SECURITY AND THE COMMON STOCK ISSUABLE UPON ITS CONVERSION HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT PURSUANT
TO AN AVAILABLE EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT AND IN
ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED
STATES AND OTHER JURISDICTIONS.

                                 CEPHALON, INC.

              3 7/8% CONVERTIBLE PROMISSORY NOTE DUE MARCH 29, 2007

No. A-__                                                             $__,000,000

         Cephalon, Inc., a Delaware corporation (the "Company"), for value
                                                      -------
received, hereby promises to pay to ANTHEM INVESTORS, LLC or its registered
assigns (the "Holder"), the principal sum of _____________ Dollars
($___,000,000), together with all accrued and unpaid interest, on March 29, 2007
(the "Maturity Date"). Interest shall accrue at the rate of 3 7/8% per annum
      -------------
until the principal hereof is due, except that interest shall accrue at the rate
of 8 7/8% per annum on any interest and principal from the date such interest or
principal is due until the obligation of the Company with respect to the payment
of such interest or principal, as the case may be, on this Convertible
Promissory Note (this "Note") shall be discharged. The Company shall pay
                       ----
interest semiannually on April 15 and October 15 of each year, commencing on
October 15, 2002. Interest shall accrue on this Note from the most recent date
to which interest has been paid or, if no interest has been paid, from March 29,
2002. Interest shall be computed on the basis of a 360-day year of twelve 30-day
months. The Company shall pay interest on this Note to the Person who is the
Holder of this Note at the close of business on April 1 and October 1, as the
case may be, next preceding the related interest payment date. Payment of the
principal and accrued and unpaid interest of this Note at maturity (whether by
acceleration, redemption or otherwise) shall be made upon the surrender of this
Note to the Company, at its chief executive office (or such other office within
the United States as shall be designated by the Company to the Holder hereof)
(the "Designated Office"), in United States of America legal tender. All amounts
      -----------------
payable in cash with respect to this Note shall be made by wire transfer to the
Holder; provided that if the Holder shall not have furnished wire instructions
in writing to the Company on or prior to the third Business Day immediately
prior to the date on which the Company shall make such payment, such payment may
be made by U.S. dollar check mailed to the address of the Holder as such address
shall appear in the Company security register. Capitalized terms used and not
otherwise defined herein shall have the respective meanings given to those terms
in Section 1 hereof.

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         1.   Definitions.

         Unless otherwise defined in this Note, the following capitalized terms
shall have the following respective meanings when used herein:

         "Affiliate" of any specified Person means 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 specified 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.

         "Business Day" means any day except a Saturday, Sunday or other day on
          ------------
which the banks in the State of New York are required or authorized by law to be
closed.

         "Change of Control" has the meaning set forth in Section 9 herein.
          -----------------

         "Closing Price" means, for any date, the price determined by the first
          -------------
of the following clauses that applies: (a) if the Common Stock is then listed or
quoted on an Eligible Market or any other national securities exchange, the
highest closing bid price per share of the Common Stock for such date (or the
nearest preceding date) on the primary Eligible Market or exchange on which the
Common Stock is then listed or quoted; (b) if prices for the Common Stock are
then quoted on the OTC Bulletin Board, the closing bid price per share of the
Common Stock for such date (or the nearest preceding date) so quoted; (c) if
prices for the Common Stock are then reported in the "Pink Sheets" published by
the National Quotation Bureau Incorporated (or a similar organization or agency
succeeding to its functions of reporting prices), the most recent bid price per
share of the Common Stock so reported; or (d) in all other cases, the fair
market value of a share of Common Stock as determined in good faith by the
mutual agreement of the Company and the Holder.

         "Common Stock" means the Common Stock, par value $.01 per share, of the
          ------------
Company. Subject to the provisions of this Section 1, shares issuable on
conversion of this Note shall include Common Stock or shares of any class or
classes of common stock resulting from any reclassification or reclassifications
thereof.

         "Conversion Price" means $70.36, as adjusted pursuant to Section 7
          ----------------
herein.

         "Effective Date" means the date that the registration statement meeting
          --------------
the requirements set forth in the Registration Rights Agreement and covering the
resale of the Securities by the Holder is first declared effective by the
Securities and Exchange Commission.

         "Eligible Market" means the New York Stock Exchange, the American Stock
          ---------------
Exchange, the Nasdaq National Market or the Nasdaq SmallCap Market.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended.
          ------------

                                       2

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         "Person" shall mean and include an individual, a partnership, a
          ------
corporation (including a business trust), a joint stock company, a limited
liability company, an unincorporated association, a joint venture or other
entity or a governmental authority.

         "Purchase Agreement" means that certain Class A Interest Purchase
          ------------------
Agreement executed and delivered in connection herewith by and between the
Company and Anthem Investors, LLC.

         "Original Issue Date" means the date of the first issuance of any
          -------------------
Notes, regardless of the number of transfers of any particular Note.

         "Registration Rights Agreement" means that certain Registration Rights
          -----------------------------
Agreement executed and delivered in connection herewith by and between the
Holder and the Company.

         "Securities" means this Note and the Common Stock.
          ----------

         "Securities Act" means the Securities Act of 1933, as amended.
          --------------

         "Subsidiary" shall mean (a) any corporation of which more than 50% of
          ----------
the issued and outstanding equity securities having ordinary voting power to
elect a majority of the board of directors of such corporation is at the time
directly or indirectly owned or controlled by the Company, (b) any partnership,
joint venture, limited liability company or other association of which more than
50% of the equity interests having the power to vote, direct or control the
management of such partnership, joint venture, limited liability company or
other association is at the time directly or indirectly owned and controlled by
the Company, and (c) any other entity included in the financial statements of
the Company on a consolidated basis.

         "Trading Day" means (i) if the Common Stock is listed or quoted and
          -----------
traded on the Nasdaq National Market or any other system of automated
dissemination of quotations of securities prices, a day on which trades may be
effected through such system; (ii) if the Common Stock is listed or quoted and
traded on the New York Stock Exchange or any other national securities exchange,
a day on which such exchange is open for business; or (iii) if the Common Stock
is not listed or quoted and traded on the Nasdaq National Market or listed or
quoted and traded on any national securities exchange or any other system of
automated dissemination of quotation of securities prices, a day on which the
Common Stock is traded regular way in the over-the-counter market and for which
a closing bid and a closing asked price for the Common Stock are available.

         "Transaction Documents" means this Note, the Registration Rights
          ---------------------
Agreement and the Purchase Agreement.

         "Triggering Event" means any of the following events: (a) the Common
          ----------------
Stock is not listed or quoted, or is suspended from trading, on an Eligible
Market for a period of three (3) consecutive Trading Days; (b) the Company fails
for any reason to deliver a certificate evidencing this Note or shares of Common
Stock issuable upon conversion of

                                       3

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this Note to the Holder within ten (10) Trading Days after delivery of such
certificate is required pursuant to any Transaction Document or if conversion
rights, with respect to this Note are otherwise suspended for any reason for a
period of more than five (5) consecutive Trading Days; (c) the Company fails to
have available a sufficient number of authorized but unissued and otherwise
unreserved shares of Common Stock available to issue Common Stock upon any
conversion of this Note; (d) at any time after the Required Effectiveness Date
(as defined in the Registration Rights Agreement), any Common Stock issuable
upon the conversion of this Note is not listed on an Eligible Market for a
period of three (3) consecutive Trading Days; (e) the Company effects or
publicly announces its intention to effect any exchange, recapitalization or
other transaction that effectively requires or rewards physical delivery of
certificates evidencing the Common Stock; (f) any other Event (as defined in
the Registration Rights Agreement) occurs and remains uncured for sixty (60)
consecutive days; (g) the Company fails to make any cash payment required under
the Transaction Documents and such failure is not cured within five (5) Trading
Days after notice of such default is first given to the Company by the Holder;
or (h) the Company defaults in the timely performance of any other obligation
under the Transaction Documents and such default continues uncured for a period
of twenty (20) days after the date on which notice of such default is first
given to the Company by the Holder (it being understood that no prior notice
need be given in the case of a default that cannot reasonably be cured within
twenty (20) days).

         2.   Redemption by Holder.

                   (a) The Holder, in its sole option, on March 28, 2005
(the "Optional Redemption Date"), may elect to require the Company to redeem
      ------------------------
this Note in whole or in part at a redemption price equal to 100% of such
principal amount, together with all accrued and unpaid interest through the
date of redemption (the "Redemption Price"). To redeem this Note for cash on
                         ----------------
the Optional Redemption Date under this Section 2(a), the Holder shall send at
least ten (10) Business Days prior to the Redemption Date to the Company a
notice by first-class mail, overnight courier, or hand delivery specifying the
amount of principal of this Note to be redeemed by the Holder (the "Optional
                                                                    --------
Redemption Notice") along with this Note duly endorsed or assigned to the
-----------------
Company in blank, provided that any failure of the Holder to surrender the Note
as provided herein shall not invalidate the redemption. The Company shall pay
or cause to be paid to the Holder the Optional Redemption Price in cash on the
Optional Redemption Date or such later date on which this Note is surrendered
to the Company at the Designated Office in the manner set forth in the
introductory paragraph to this Note.

                   (b) The Holder, in its sole option upon the occurrence of a
Triggering Event (the "Triggering Event Redemption Date" and together with the
                       --------------------------------
Optional Redemption Date, a "Redemption Date"), may elect to require the
                             ---------------
Company to redeem this Note in whole or in part at the Redemption Price. To
exercise its option to redeem this Note for cash under this Section 2(b), the
Holder shall send to the Company a notice by first-class mail, overnight
courier, or hand delivery specifying the amount of principal of this Note to be
redeemed by the Holder (the "Redemption Notice") within sixty (60) days
                             -----------------
following the occurrence of the Triggering Event to which such Triggering Event
Redemption Date relates, along with this Note duly endorsed or assigned to the
Company

                                       4

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in blank, provided that any failure of the Holder to surrender this Note as
provided herein shall not invalidate the redemption. The Company shall pay or
cause to be paid to the Holder the Redemption Price in cash within ten (10)
Business Days following the date of the Redemption Notice or such later date on
which this Note is surrendered to the Company at the Designated Office.

         3.   Registration of Notes. The Company shall register this Note upon
records to be maintained by the Company for that purpose (the "Note Register")
                                                               -------------
in the name of each record holder thereof from time to time. The Company may
deem and treat the registered Holder of this Note as the absolute owner hereof
for the purpose of any conversion hereof or any payment of interest hereon, and
for all other purposes, absent actual notice to the Company to the contrary.

         4.   Registration of Transfers and Exchanges. The Company shall
register the transfer of any portion of this Note in the Note Register upon
surrender of this Note to the Company at the Designated Office. Upon any such
registration or transfer, a new Note, in substantially the form of this Note
(any such new Note, a "New Note"), evidencing the portion of this Note so
                       --------
transferred shall be issued to the transferee and a New Note evidencing the
remaining portion of this Note not so transferred, if any, shall be issued to
the transferring Holder. The acceptance of the New Note by the transferee
thereof shall be deemed the acceptance by such transferee of all of the rights
and obligations of a holder of a Note. This Note is exchangeable for an equal
aggregate principal amount of Notes of different authorized denominations, as
requested by the Holder surrendering the same. No service charge or other fee
will be imposed in connection with any such registration of transfer or
exchange.

         5.   Conversion. At the option of the Holder, all (or any portion
thereof equal to $1,000 or any integral multiple thereof) of the principal
amount of this Note may be converted into Common Stock based on the
then-applicable Conversion Price. The Holder may convert this Note into Common
Stock pursuant to this paragraph at any time and from time to time after the
Original Issue Date, by delivering to the Company a notice, in the form
attached hereto (the "Conversion Notice"), appropriately completed and duly
                      ----------------
signed (and accompanied or preceded by a certificate as to the incumbency and
signature of such signatory), and the date any such Conversion Notice is
delivered to the Company (as determined in accordance with the notice
provisions hereof) is a "Conversion Date."
                         ---------------

         6.   Mechanics of Conversion.

                   (a) The number of shares of Common Stock issuable upon any
conversion hereunder shall equal the outstanding principal amount of this Note
to be converted, divided by the Conversion Price on the Conversion Date.

                   (b) Upon conversion of this Note, the Company shall promptly
(but in no event later than three (3) Trading Days after the Conversion Date)
issue or cause to be issued and cause to be delivered to or upon the written
order of the Holder and in such name or names as the Holder may designate on
the Conversion Notice a certificate for the

                                       5

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Common Stock issuable upon such conversion, with appropriate restrictive legends
and shall pay or cause to be paid to the Holder, or its designee, in cash the
amount of any accrued and unpaid interest, if any, through the Conversion Date.
The Holder, or any Person so designated by the Holder to receive Common Stock,
shall be deemed to have become holder of record of such Common Stock as of the
Conversion Date. The Company shall, upon request of the Holder, use its
commercially reasonable efforts to deliver Common Stock hereunder electronically
through the Depository Trust Corporation or another established clearing
corporation performing similar functions.

                   (c)  The Holder shall be required to deliver this Note in
order to receive certificates for common stock pursuant to a conversion
hereunder. Execution and delivery of the Conversion Notice shall have the same
effect as cancellation of the original Note and issuance of a New Note
representing the remaining outstanding principal amount. Upon surrender of this
Note following one or more partial conversions, the Company shall promptly
deliver to the Holder a New Note representing the remaining outstanding
principal amount.

                   (d) The Company's obligations to issue and deliver Common
Stock upon conversion of this Note in accordance with the terms hereof are
absolute and unconditional, irrespective of any action or inaction by the
Holder to enforce the same, any waiver or consent with respect to any provision
hereof, the recovery of any judgment against any Person or any action to
enforce the same, or any setoff, counterclaim, recoupment, limitation or
termination, or any breach or alleged breach by the Holder or any other Person
of any obligation to the Company or any violation or alleged violation of law
by the Holder or any other Person, and irrespective of any other circumstance
which might otherwise limit such obligation of the Company to the Holder in
connection with the issuance of such Common Stock.

         7.   Certain Adjustments. The Conversion Price is subject to
adjustment from time to time as set forth in this Section 7.

                   (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 thereafter shall be entitled
to receive that number of shares of Common Stock which it would have owned had
this Note 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

                                       6

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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 (f) of this Section 7) 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 (f) of this Section 7) 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 (a) dividends or distributions paid exclusively in cash or (b)
dividends or distributions referred to in subsection (a) of this Section 7, 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 7 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 (f) of this Section 7) of the Common Stock on the record date
mentioned below less the fair market value on such record date (as determined
in good faith 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 Holder) 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 (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 (f) of this Section 7) of the Common Stock on such
record date. Such adjustment shall be

                                       7

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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 (or
the Conversion Price) per share of the Common Stock on such record date, in
lieu of the foregoing adjustment, adequate provision shall be made so that the
Holder of the Note 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 Note 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 7(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 stockholder rights
splan ("Rights Plan"), upon conversion of the Note into Common Stock, to the
extent that the Rights Plan has been implemented and is still in effect upon
such conversion, the holders of the Note 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 7(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 ("Specified 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 7 (and no adjustment to the Conversion
Price under this Section 7 will be required) until the occurrence of the
earliest Specified 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 7(c). If any such right or
warrant, including any such existing rights or warrants distributed prior to
the date of this Note, 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

                                       8

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thereof). In addition, in the event of any distribution (or deemed
distribution) of rights or warrants, or any Specified 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 7 was made, (a) 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 Specified Event, as the case may be, as though it were a cash
distribution, equal to the per 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
(b) 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.

                   (d) Distributions. 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, the Holder shall be
entitled to such cash distribution as if such Holder had converted this Note
into shares of Common Stock.

                   (e) Tender Offer. 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
in good faith by the Board of Directors, whose determination shall be
conclusive evidence thereof and which shall be evidenced by an officers'
certificate delivered to the Holder) of any other consideration) that exceeds
the product of the lesser of (x) the Conversion Price then in effect and (y)
the Current Market Price per share of Common Stock (as determined in accordance
with subsection (f) of this Section 7 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 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 by the
amount of such excess (determined on a per share basis), 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 7(e) 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 7(e)

                                      9

<PAGE>

                  (f)  For the purpose of any computation under this Section 7,
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 subsections (d) and (e) of this Section 7
or (ii) the record date with respect to distributions, issuances or other
events requiring such computation under subsection (b) or (c) of this Section
7. If the Closing Prices are unavailable, 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 Holder).

                   (g) 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 7 are not required to be made shall be carried
forward and taken into account in any subsequent adjustment. All calculations
under this Section 7 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 Note 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.

                   (h) The Company shall be entitled to make such reductions in
the Conversion Price, in addition to those required by Section 7(b), 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.

                   (i) Whenever the Conversion Price or conversion privilege is
adjusted, the Company shall promptly mail to the Holder an officers'
certificate briefly stating the facts requiring the adjustment and the manner
of computing it.

                   (j) In the event that:

                   (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 the Holder 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

                                      10

<PAGE>

date. Failure to mail such notice or any defect therein
shall not affect the validity of any transaction referred to in clause (a), (b)
or (c) of this Section 7.

                   (k) If any of the following events occur, namely (i) any
reclassification or change of the outstanding shares of Common Stock (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), (ii) any
consolidation, merger or combination of the Company with another Person as a
result of which holders of Common Stock shall be entitled to receive stock,
securities or other property or assets (including cash) with respect to or in
exchange for such Common Stock, or (iii) any sale or conveyance of the
properties and assets of the Company as, or substantially as, an entirety to
any other Person as a result of which holders of Common Stock shall be entitled
to receive stock, securities or other property or assets (including cash) with
respect to or in exchange for such Common Stock, then prior to such
reclassification, change, consolidation, merger, combination or sale the
Company or the successor or purchasing Person, as the case may be, shall
execute with the Holder a written agreement providing that (x) this Note shall
be convertible into the kind and amount of shares of stock and other securities
or property or assets (including cash) receivable upon such reclassification,
change, consolidation, merger, combination, sale or conveyance by the holder of
a number of shares of Common Stock issuable upon conversion of this Note
immediately prior to such reclassification, change, consolidation, merger,
combination, sale or conveyance, and, if holders of Common Stock have the right
to elect as to the kind or amount of securities, cash or other property
receivable upon such reclassification, change, consolidation, merger,
combination, sale or conveyance, the Holder shall be provided the option (on
the same time frame as is afforded to holders of Common Stock) to elect as to
which kind or amount of securities, cash or other property receivable upon such
reclassification, change, consolidation, merger, combination, sale or
conveyance into which the Note will be convertible after the consummation of
such reclassification, change, consolidation, merger, combination, sale or
conveyance (provided that, if the Holder does not make any such election within
the time frame provided, then for the purposes of this Section 7(k) the Holder
shall be deemed to have elected to have the Note become convertible into the
same kind or amount of securities, cash or other property receivable upon such
reclassification, change, consolidation, merger, combination, sale or
conveyance as is received by the holders of a plurality of the shares of Common
Stock as to which an election has been made), (y) in the case of any such
successor or purchasing Person, upon such consolidation, merger, combination,
sale or conveyance such successor or purchasing Person shall be jointly and
severally liable with the Company for the payment and performance of all of the
Company's obligations under this Note, the Registration Rights Agreement and
the Purchase Agreement and (z) if registration or qualification is required
under the Securities Act or applicable state law for the public resale by the
Holder of the shares of stock or other securities so issuable upon conversion
of this Note, such registration or qualification shall be completed and
effective prior to such reclassification, change, consolidation, merger,
combination, sale or conveyance (it being understood that if the requirements
of this clause (z) cannot be achieved by the Company, using commercially
reasonable efforts, then such requirements shall be satisfied by the Company
and/or successor or purchasing Person as promptly as practicable (but in no
event later than thirty (30) days after the date of such event)). Such written
agreement

                                       11

<PAGE>

shall provide for adjustments which shall be as nearly equivalent as may be
practicable to the adjustments provided for in this Section. If, in the case of
any such reclassification, change, consolidation, merger, combination, sale or
conveyance, the stock or other securities and assets receivable thereupon by a
holder of shares of Common Stock includes shares of stock or other securities
and assets of a Person other than the successor or purchasing Person, as the
case may be, in such reclassification, change, consolidation, merger,
combination, sale or conveyance, then such written agreement shall also be
executed by such other Person and shall contain such additional provisions to
protect the interests of the Holder as the Board of Directors shall reasonably
consider necessary by reason of the foregoing, including, without limitation,
the provisions providing for the Holder's redemption rights set forth in
Section 2 herein. The above provisions of this Section shall similarly apply to
successive reclassifications, changes, consolidations, mergers, combinations,
sales and conveyances.

                   (l) 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.

                   (m) Calculations. All calculations under this Section 7 shall
                       ------------
be made to the nearest cent or the nearest 1/100th of a share, as applicable.
The number of shares of Common Stock outstanding at any given time shall not
include shares owned or held by or for the account of the Company, and the
disposition of any such shares shall be considered an issue or sale of Common
Stock.

                   (n) Notice of Adjustments. Upon the occurrence of each
                       ---------------------
adjustment pursuant to this Section 7, the Company at its expense will promptly
compute such adjustment in accordance with the terms hereof and prepare a
certificate describing in reasonable detail such adjustment and the
transactions giving rise thereto, including all facts upon which such
adjustment is based. Upon written request, the Company will promptly deliver a
copy of each such certificate to the Holder.

                   (o) Notice of Corporate Events. If the Company (i) declares
                       --------------------------
a dividend or any other distribution of cash, securities or other property in
respect of its Common Stock, including without limitation any granting of
rights or warrants to subscribe for or purchase any capital stock of the
Company or any Subsidiary, (ii) authorizes or approves, enters into any
agreement contemplating or solicits stockholder approval for any Change in
Control or (iii) authorizes the voluntary dissolution, liquidation or winding
up of the affairs of the Company, then the Company shall deliver to the Holder
a notice describing the material terms and conditions of such transaction, at
least ten (10) calendar days prior to the applicable record or effective date
on which a Person would need to hold Common Stock in order to participate in or
vote with respect to such transaction; provided,

                                      12

<PAGE>

however, that the failure to deliver such notice or any defect therein shall
not affect the validity of the corporate action required to be described in
such notice.

         8. Limitation on Conversion. Notwithstanding anything to the contrary
contained herein, the number of shares of Common Stock that may be acquired by
the Holder upon any conversion of this Note (or otherwise in respect hereof)
shall be limited to the extent necessary to insure that, following such
conversion (or other issuance), the total number of shares of Common Stock then
beneficially owned by such Holder and its Affiliates and any other Persons
whose beneficial ownership of Common Stock would be aggregated with the
Holder's for purposes of Section 13(d) of the Exchange Act, does not exceed
4.999% (the "Maximum Percentage") of the total number of issued and outstanding
shares of Common Stock (including for such purpose the shares of Common Stock
issuable upon such conversion). For such purposes, beneficial ownership shall
be determined in accordance with Section 13(d) of the Exchange Act and the
rules and regulations promulgated thereunder. Each delivery of a Conversion
Notice by the Holder will constitute a representation by the Holder that it has
evaluated the limitation set forth in this paragraph and determined that
issuance of the full number of shares of Common Stock requested in such
Conversion Notice is permitted under this paragraph. By written notice to the
Company, the Holder may waive the provisions of this Section or increase or
decrease the Maximum Percentage to any other percentage specified in such
notice, but (i) any such waiver or increase will not be effective until the
61st day after such notice is delivered to the Company, and (ii) any such
waiver or increase or decrease will apply only to the Holder and not to any
other holder of Notes.

         9. Change in Control.

                   (a) If at any time that this Note remains outstanding there
shall occur a Change in Control, the Holder shall have the right to receive, at
its option, on the date of the consummation of such Change in Control or as of
the date that is thirty (30) Business Days after the occurrence of the Change
in Control (the "Change in Control Purchase Date"), either (A) for each share
                 -------------------------------
of Common Stock that would have been issuable upon such conversion of the Notes
upon the effective time of such Change of Control, the same kind and amount of
securities, cash or property as it would have been entitled to receive upon the
occurrence of such Change of Control if it had been, immediately prior to such
Change of Control, the holder of one share of Common Stock, (B) from March 29,
2002 but on or before March 29, 2003, cash in an amount equal to 110% of the
outstanding principal amount of this Note plus all accrued but unpaid interest
thereon through the date of payment, and after March 29, 2003, cash in an
amount equal to 100% of the outstanding principal amount of this Note plus all
accrued but unpaid interest thereon through the date of payment (in either
case, the "Change in Control Purchase Price") or (C) to have such successor to
           --------------------------------
the Company or surviving entity in the Change of Control issue to the Holder a
New Note with a principal balance equal to the outstanding principal balance of
this Note, plus all accrued but unpaid interest thereon, and consistent with
terms substantially equivalent to the terms of this Note held by such Holder
and evidencing the Holder's right to convert such Note into the consideration
described in clause (A). If holders of Common Stock are given any choice as to
the securities, cash or property to be received in a Change of Control
transaction, then the Holder shall be given

                                      13

<PAGE>

the same choice as to the consideration it receives pursuant to clause (A)
above. Failure of the Holder to timely provide written notice of its election
shall be deemed an election by such Holder to receive the consideration
specified in clause (C) above.

                   (b) If the Holder elects to receive the consideration
specified in clause (C) in Section 9(a) above, (i) the successor entity shall be
jointly and severally liable with the Company for the payment and performance of
all of the Company's obligations under this Note, the Registration Rights
Agreement and the Purchase Agreement and (ii) the Company and the successor
entity shall, if registration or qualification is required under the Securities
Act or applicable state law for the public resale by the Holder of the shares of
stock or other securities so issuable upon conversion of this Note or the New
Note, have such registration or qualification completed prior to such Change of
Control (it being understood that if the requirements of this clause (ii) cannot
be achieved by the Company, using commercially reasonable efforts, then such
requirements shall be satisfied by the Company and/or successor or purchasing
Person as promptly as practicable (but in no event later than thirty (30) days
after the date of such event)). To the extent the Company elects to have the
successor to the Company or the surviving entity issue a New Note, the terms of
any agreement pursuant to which a Change of Control is effected shall include
terms requiring any such successor or surviving entity to comply with the
provisions substantially equivalent to the provisions of this Section 9 and
providing that this Note (or any such replacement security) will be similarly
adjusted upon any subsequent transaction analogous to a Change of Control.

                        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).

                                      14

<PAGE>

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 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 Note, 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 sixty (60) days of the date of
determination of a Change in Control.

                   (c) Within ten (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 Holder. 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 9 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 Note;
                        (6) briefly, the conversion rights of the Note;

                        (7) the Conversion Price and any adjustments thereto;

                        (8) that Note as to which a Change in Control Purchase
Notice has been given may be converted into Common Stock pursuant to Section 7
of this Note only to the extent that the Change in Control Purchase Notice has
been withdrawn by the Holder;

                        (9) the procedures that the Holder must follow to
exercise rights under this Section 9;

                                      15

<PAGE>

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

                        (11) that the Holder must satisfy the requirements set
forth in the Note in order to convert the Note.

                   (d) The Holder may exercise its rights specified in
subsection (a) of this Section 9 upon delivery of a written notice (which may
be delivered by letter, overnight courier, hand delivery, facsimile
transmission or in any other written form) of the exercise of such rights (a
"Change in Control Purchase Notice") to any the Company 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 Note to the Company (together
with all necessary endorsements) at the office of the Company 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, pursuant
to this Section 9, a portion of the Note if the principal amount of such
portion is $1,000 or an integral multiple of $1,000.

                        Notwithstanding anything herein to the contrary, a
Holder delivering to the Company the Change in Control Purchase Notice
contemplated by this subsection (d) 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
Company in accordance with Section 9(e) below.

                   (e) Upon receipt by the Company of the Change in Control
Purchase Notice, the Holder 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 the Note. Such Change in
Control Purchase Price shall be paid to the Holder promptly following the later
of (a) the Change in Control Purchase Date with respect to the Note (provided
the conditions in this Section 9 have been satisfied) and (b) the time of
delivery of such Note to the Paying Agent by the Holder thereof in the manner
required by Section 9(a). A Note 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 Section 7 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) of withdrawal
delivered by the Holder to the Company at any time prior to the close of
business on the Business Day immediately preceding the Change in Control
Purchase Date, specifying the principal

                                      16

<PAGE>

amount of the Note 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.

                   (f) On or before 11:00 a.m. New York City time on the Change
in Control Purchase Date, the Company shall deposit with a bank or trust
company having a combined capital and surplus of at least $50,000,000 (the
"Paying Agent") 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 the Note or portion thereof that are to be
purchased as of such Change in Control Purchase Date. The manner in which the
deposit required by this Section 9(f) 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 Paying Agent shall have immediately available funds on the Change
in Control Purchase Date.

                         If the Paying Agent holds, in accordance with the terms
hereof, money sufficient to pay the Change in Control Purchase Price of the
Note for which a Change in Control Purchase Notice has been tendered and not
withdrawn in accordance with this Note then, on the Change in Control Purchase
Date, such Note 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).

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

                   (h) In connection with any offer to purchase or purchase of
a Note under Section 9, 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
Holder and obligations of the Company to be exercised in the time and in the
manner specified therein.

                   (i) To the extent that the aggregate amount of cash deposited
by the Company pursuant to Section 9(f) exceeds the aggregate Change in Control
Purchase Price together with interest, if any, thereon of the Note or portions
thereof that the Company is obligated to purchase, then promptly after the
Change in Control Purchase Date the Paying Agent shall return any such excess
cash to the Company.

         10. Fractional Shares. The Company shall not be required to issue or
cause to be issued fractional Common Stock on conversion of this Note; in lieu
thereof, an amount

                                      17

<PAGE>

will be paid in cash based upon the Closing Price of the Common Stock on the
Trading Day immediately prior to the Conversion Date.

         11.  Event or Events of Default.

                   (a) An "Event of Default" shall occur if
                           ----------------

                        (1) the Company defaults in the payment of any interest
on the Note when the same becomes due and payable and the default continues for
a period of thirty (30) days;

                        (2) the Company defaults in the payment of any principal
of (including, without limitation, any premium, if any, on) the Note when the
same becomes due and payable (whether at maturity, upon redemption, on a Change
of Control Purchase Date or otherwise);

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

                        (4) the Company defaults in the payment of the
Redemption Price or the Change in Control Purchase Price of the Note when the
same becomes due and payable; or

                        (5) the Company fails to provide a Change in Control
 Purchase Notice when required by Section 9; or

                        (6) any indebtedness under any bond, debenture, note
or other evidence of indebtedness for money borrowed by the Company or any
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 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 thirty (30) days
after there shall have been given, by registered or certified mail, to the
Company by the Holder 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 Subsidiary, pursuant to or within
the meaning of any Bankruptcy Law:

                             (i)   commences a voluntary case or proceeding;

                                      18

<PAGE>

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

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

                             (iv)  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:

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

                             (ii)  appoints a Custodian of the Company or
any Subsidiary or for all or substantially all of the property of the Company or
any Subsidiary; or
                             (iii) orders the liquidation of the Company or any
Subsidiary;

and in each case the order or decree remains unstayed and in effect for sixty
(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.
Clauses (7) and (8) of this Section 11(a) shall each be referred to as a
"Bankruptcy Event".

                   A default under clause (3) above is not an Event of Default
until the Holder notifies the Company in writing of the default, and the
Company does not cure the default within sixty (60) days after receipt of such
notice. The notice given pursuant to this Section 11 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 11 is cured, it ceases.

              (b) If an Event of Default (other than an Event of Default
specified in clause (7) or (8) of Section 11(a) above) occurs and is
continuing, the Holder may, by notice to the Company, declare all unpaid
principal to the date of acceleration on the Note 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 11(a) occurs, all unpaid principal of
the Note then outstanding shall ipso facto become and be immediately due and
payable without any declaration or other act on the part of the Holder. The
Holder, by notice to the Company, may rescind an acceleration and its
consequences if (a) all existing Events of Default, other than the nonpayment
of the principal of the Note 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

                                      19

<PAGE>

the Note) on overdue installments of interest and overdue principal, which has
become due otherwise than by such declaration of acceleration, has been paid;
and (c) the rescission would not conflict with any judgment or decree of a
court of competent jurisdiction. No such rescission shall affect any subsequent
default or impair any right consequent thereto.

              (c)  A delay or omission by the Holder 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.

              (d) The Holder, by notice to the Company, may waive an existing
default or Event of Default and its consequence. When a default or Event of
Default is waived, it is cured and ceases.

              (e) Notwithstanding any other provision of this Note, the
right of the Holder to receive payment of the principal of and interest on the
Note, on or after the respective due dates expressed in the Note, to convert
the Note in accordance with Section 7 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.

         12.  Covenants of the Company.

              (a) The Company shall duly and punctually pay or cause to be paid
the principal of and interest on this Note, at the respective times and in the
manner provided for herein.

              (b) The Common Stock which may be delivered upon conversion of the
Note, upon such delivery, will have been duly authorized and validly issued and
will be fully paid, nonassessable and free of preemptive rights (and shall be
issued out of the Company's authorized but unissued Common Stock).

              (c) The Company shall file all reports and other information and
documents which it is required to file with the Securities Exchange Commission
pursuant to Section 13 or 15(d) of the Exchange Act.

              (d) Upon request of the Holder, 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 Note.

              (e) The Company will do or cause to be done all things necessary
to preserve and keep in full force and effect its corporate existence.

              (f) 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) of the
Exchange Act, upon the request of the Holder

                                       20

<PAGE>

or beneficial owner of this Note make available to such Holder or beneficial
owner of Notes or any shares of Common Stock issued upon conversion thereof
which continue to be restricted securities in connection with any sale hereof
and any prospective purchaser of this Note or such Common Stock designated by
such Holder or beneficial owner, the information required pursuant to Rule
144A(d)(4) under the Securities Act (if this Note qualifies for trading
pursuant to Rule 144A under the Securities Act) or such Common Stock and it
will take such further reasonable action as the Holder or beneficial owner of
this Note or such Common Stock may reasonably request, all to the extent
required from time to time to enable such Holder or beneficial owner to sell
this Note or the shares of Common Stock issued or issuable upon its conversion
without registration under the Securities Act within the limitation of the
exemption provided by Rule 144A under the Securities Act (if Rule 144A is
available for such sale), as such Rule may be amended from time to time. Upon
the request of the Holder or any beneficial owner of this Note or such Common
Stock, the Company will deliver to such Holder a written statement as to
whether it has complied with such requirements.

              (g) 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 on the
Notes 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 Holder, but will suffer and permit the execution of every
such power as though no such law had been enacted.

              (h) The Company will effect all registrations with, and obtain
all approvals by, all governmental authorities that may be necessary under any
United States Federal or state law for the Common Stock issuable upon
conversion of this Note to be lawfully issued and delivered as provided herein
and as set forth in the Registration Rights Agreement.

         13.Notices. Any and all notices or other communications or deliveries
hereunder (including without limitation any Conversion Notice) shall be in
writing and shall be deemed given and effective on the earliest of (i) the date
of transmission, if such notice or communication is delivered via facsimile at
the facsimile number specified in this Section prior to 5:30 p.m. (New York
City time) on a Trading Day, (ii) the next Trading Day after the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile number specified in this Section on a day that is not a Trading Day
or later than 5:30 p.m. (New York City time) on any Trading Day, (iii) the
Trading Day following the date of mailing, if sent by nationally recognized
overnight courier service, or (iv) upon actual receipt by the party to whom
such notice is required to be given. The addresses for such communications
shall be: (i) if to the Company, to 145 Brandywine Parkway, West Chester, PA
19380, facsimile: (610) 738-6258, attention John E. Osborn, Esq., or (ii) if to
the Holder, to the address or facsimile number

                                      21

<PAGE>

appearing on the Company's noteholder records or such other address or
facsimile number as the Holder may provide to the Company in accordance with
this Section.

         14. Miscellaneous.

              (a) No provision of this Note shall alter or impair the obligation
of the Company, which is absolute and unconditional, to pay the principal of
and interest, if any, on this Note at the times, places and rate, and in the
coin or currency, herein prescribed.

              (b) The Company will give prompt written notice to the Holder of
any change in the location of the its designated office. Any notice to the
Company or to the Holder shall be given in the manner set forth herein,
provided that the Holder may specify alternative notice instructions to the
Company.

              (c) The Company waives presentment, demand, protest and notice
of dishonor and protest and all other demands and notices in connection with
the payment and enforcement of this Note. No waiver on the part of any party
hereto in exercising any right hereunder shall operate as a waiver of such
right or any other right.

              (d) This Note may not be Transferred (as defined below), except
as set forth below.

                   (1) This Note and the Common Stock issuable upon conversion
of this Note have not been registered under the Securities Act, or the
securities laws of any state or other jurisdiction. Neither the Common Stock
issuable upon conversion of this Note nor any interest or participation herein
may be reoffered, sold, assigned, transferred, pledged, encumbered or otherwise
disposed of (a "Transfer"), except by the Holder to ___________________. and to
                --------
any Affiliate thereof, in the absence of such registration or unless such
transaction is exempt from, or not subject to, registration.

                   (2) Upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this Note,
and in the case of loss, theft or destruction, receipt of indemnity or security
reasonably satisfactory to the Company, and upon reimbursement to the Company
of all reasonable expenses incidental thereto, and upon surrender and
cancellation of such Note, if mutilated, the Company will deliver a New Note of
like tenor and dated as of such cancellation, in lieu of such Note.

                   (3) Such holder represents that it is an "accredited
investor" within the meaning of Rule 501(a) of the Securities Act. Such holder
has been advised that this Note has not been registered under the Securities
Act, or any state securities laws, and cannot be resold.

                   (4) Neither this Note nor any term hereof may be amended or
waived orally or in writing, except that any term of this Note may be amended
and the observance of any term of this Note may be waived (either generally or
in a particular instance and either retroactively or prospectively), and such
amendment or waiver shall

                                      22

<PAGE>

be applicable to this Note, upon the written approval of the Company and the
Holder hereof.

                   (5) The Holder understands that until the shares of Common
Stock into which this Note may convert (the "Shares") have been registered
                                             ------
under the Securities Act or otherwise may be sold by the Holder under Rule 144
thereunder, the certificates for the Shares shall bear a restrictive legend in
substantially the following form:

                  "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
                  REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR
                  THE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. THE
                  SHARES REPRESENTED HEREBY MAY NOT BE OFFERED OR SOLD IN THE
                  ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SHARES
                  UNDER APPLICABLE SECURITIES LAWS UNLESS OFFERED, SOLD OR
                  TRANSFERRED UNDER AN AVAILABLE EXEMPTION FROM THE REGISTRATION
                  REQUIREMENTS OF THOSE LAWS."

Certificates evidencing Securities shall not be required to contain such legend
or any other legend (i) following any sale of such Securities pursuant to Rule
144 under the Securities Act, or (ii) if such Securities are eligible for sale
under Rule 144(k) under the Securities Act, or (iii) if such legend is not
required under applicable requirements of the Securities Act (including judicial
interpretations and pronouncements issued by the Staff of the Commission). The
Company may not make any notation on its records or give instructions to any
transfer agent of the Company that enlarge the restrictions on transfer set
forth in this Section. Promptly upon the effectiveness of a registration
statement covering the resale of the Shares, the Company shall use its
reasonable best efforts to cause its counsel to deliver an opinion and
instructions to the transfer agent of the Company instructing such transfer
agent to remove the foregoing legend from any certificates representing the
Shares upon receipt of confirmation from a Holder that such Holder intends to
sell the Shares in accordance with the Plan of Distribution included in the
applicable registration statement.

                   (6) The Company acknowledges and agrees that the Holder may
from time to time pledge pursuant to a bona fide margin agreement or grant a
security interest in some or all of the Securities and, if required under the
terms of such arrangement, such Holder may transfer pledged or secured
Securities to the pledgees or secured parties to the extent permitted under
applicable laws and regulations. Such a pledge or transfer would not be subject
to approval of the Company and no legal opinion of the pledgee, secured party
or pledgor shall be required in connection therewith unless the Company
reasonably and in good faith believes that such pledge or grant of security
interest may violate applicable laws or regulations. Further, no notice shall
be required of such pledge. At the appropriate Holder's expense, the Company
will execute and deliver such reasonable documentation as a pledgee or secured
party of Securities may reasonably request in connection with a pledge or
transfer of the Securities, including the

                                      23

<PAGE>

preparation and filing of any required prospectus supplement under Rule
424(b)(3) of the Securities Act or other applicable provision of the Securities
Act to appropriately amend the list of Selling Stockholders thereunder.

                   (e) THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. THE COMPANY AND THE HOLDER
OF THIS SECURITY IRREVOCABLY AND UNCONDITIONALLY CONSENTS TO SUBMIT TO THE
EXCLUSIVE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK AND OF THE UNITED
STATES OF AMERICA, IN EACH CASE LOCATED IN THE COUNTY OF NEW YORK, FOR ANY
DISPUTE ARISING OUT OF OR RELATING TO THIS SECURITY.

                  [Remainder of page intentionally left blank.]

                                       24

<PAGE>

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

      Dated:  March 29, 2002

                                          CEPHALON, INC.

                                          By:  /s/ J. Kevin Buchi
                                             -----------------------------------
                                          Name:  J. Kevin Buchi
                                          Title: Senior Vice President and Chief
                                                 Financial Officer

Attest: /s/ John E. Osborn
       ------------------------
Name:  John E. Osborn
Title: Senior Vice President,
       General Counsel & Secretary

<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)

This Conversion Notice must be accompanied by an Incumbency Certificate or the
Company must have been previously provided with an Incumbency Certificate that
has not been revoked by the Person completing this form.

<PAGE>

                           OPTION TO ELECT REPURCHASE
                            UPON A CHANGE OF CONTROL

         To:  Cephalon, Inc.

         The undersigned registered owner of this Note 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 Note, or the
portion thereof (which is $1,000 or an integral multiple thereof) below
designated, in accordance with the terms of this Note at the Change in Control
Purchase Price, together with accrued interest to, but excluding, such date, to
the registered Holder hereof.

Dated: ___________________________     _________________________________________

                                       _________________________________________
                                       Signature(s)

         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 Note in every particular, without
alteration or any change whatsoever.<PAGE>

                                                                     EXHIBIT 4.2

                                  $55,000,000

                                 Cephalon, Inc.

            3 7/8% Convertible Subordinated Notes due March 29, 2007

                          REGISTRATION RIGHTS AGREEMENT
                          -----------------------------

                                                                  March 29, 2002

ANTHEM INVESTORS, LLC
c/o Wilmington Trust Company
1100 North Market Street
Wilmington, DE  19801
Attn: Corporate Trust Administration

Ladies and Gentlemen:

Cephalon, Inc., a Delaware corporation (the "Company"), proposes to issue to
Anthem Investors, LLC ("Anthem") upon the terms set forth in a Class A Interest
Purchase Agreement dated as of the date hereof (the "Purchase Agreement"),
$55,000,000 aggregate principal amount of its 3 7/8% Convertible Subordinated
Notes due March 29, 2007 (the "Notes"). The Notes 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 Notes. Capitalized terms used
herein but not defined shall have the meaning ascribed to them in the Note or
Purchase Agreement, as applicable. As a condition to Anthem's agreement to enter
into the Purchase Agreement, the Company agrees with Anthem, for the benefit of
(i) Anthem and (ii) any subsequent holder or holders of the Notes and the Common
Stock issuable upon conversion of the Notes (the "Conversion Shares") from time
to time until such time as such Conversion Shares 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, within sixty (60)
days after the date hereof (the "Filing Date"), file with the Securities and
Exchange Commission (the "Commission") and thereafter use its commercially
reasonable efforts to cause to be declared effective as promptly as possible,
but not later than 120 days after the date hereof (the "Required Effectiveness
Date"), a registration statement on Form S-3 (the "Shelf Registration
Statement") relating to the offer and sale of the Transfer Restricted Securities
(as defined below) 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 shall
                                         --------  -------
be entitled to have the Conversion Shares held by it covered by such Shelf

                                        1

<PAGE>

Registration Statement unless such Holder agrees in writing to be bound by all
the provisions of this Agreement applicable to such Holder. The Company also
shall respond in writing to any comments received from the Commission on the
Shelf Registration Statement and any amendment thereto within ten (10) calendar
days after the receipt of such comments. As used in this agreement, "Transfer
Restricted Securities" means each Conversion Share until (i) the date on which
such Conversion Share 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 Conversion Share 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.

         (b)  The Company shall use 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 Conversion Shares until the Conversion Shares can be
sold to the public under 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").

         (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.

         (d)  Upon the occurrence of any Event (as defined below) and on every
monthly anniversary thereof until the applicable Event is cured, as partial
relief for the damages suffered therefrom by the Holders (which remedy shall not
be exclusive of any other remedies available at law or in equity), the Company
shall pay to each Holder an amount in cash, as liquidated damages and not as a
penalty, equal to 1.0% of the aggregate principal balance of the Notes held by
such Holder. The liquidated damages payable pursuant to the terms hereof shall
apply on a pro-rata basis for any portion of a month prior to the cure of an
Event. For such purposes, each of the following that occurs shall constitute an
"Event":

                    i.  a Shelf Registration Statement is not filed on or prior
                        to the Filing Date or is not declared effective on or
                        prior to the applicable Required Effectiveness Date;

                  ii.   after the Effective Date for the Shelf Registration
                        Statement, a Holder is not permitted to sell Conversion
                        Shares under such Shelf Registration Statement (or a
                        subsequent Shelf Registration Statement filed in
                        replacement thereof) for any reason for five or more
                        Trading Days (whether or not consecutive);

                  iii.  the Common Stock is not listed or quoted, or is
                        suspended from trading, on an Eligible Market for a
                        period of three Trading Days (which need not be
                        consecutive Trading Days);

                                        2

<PAGE>

                   iv.  the Company fails for any reason to deliver a
                        certificate evidencing any Securities to a Holder within
                        three Trading Days after delivery of such certificate is
                        required pursuant to any Transaction Document or the
                        exercise or conversion rights of the Holders pursuant to
                        the Transaction Documents are otherwise suspended for
                        any reason;

                    v.  the Company fails to have available a sufficient number
                        of authorized but unissued and otherwise unreserved
                        shares of Common Stock available to issue Conversion
                        Shares upon any conversion of convertible Notes; or

                   vi.  after the Effective Date for a Shelf Registration
                        Statement, any Conversion Shares covered by such Shelf
                        Registration Statement are not listed on an Eligible
                        Market.

         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 Anthem, (A) prior to the filing
thereof with the Commission, a copy of the Shelf Registration Statement, (B)
within three days following the filing thereof with the Commission, each
amendment to the Shelf Registration Statement and each supplement, if any, to
the Prospectus, and (C) shall use its reasonable efforts to reflect in the Shelf
Registration Statement, when so filed with the Commission, such comments as the
Holders reasonably may propose; and (ii) include the names of the Holders who
propose to sell Conversion Shares pursuant to the Shelf Registration Statement
as selling securityholders and who have completed and returned to the Company a
questionnaire to be provided to the Holders by the Company (a "Completed
Questionnaire").

         (b)  The Company shall give written notice to the Holders of the
Conversion Shares 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)  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;

                                        3

<PAGE>

                  (v)   of the receipt by the Company or its legal counsel of
         any notification with respect to the suspension of the qualification
         of the Conversion Shares 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 use its commercially reasonable efforts to avoid
the issuance of or, if issued, obtain the withdrawal at the earliest possible
time, of any order suspending the effectiveness of the Shelf Registration
Statement.

         (d)  The Company shall promptly furnish to each Holder of Conversion
Shares included as a selling securityholder in the Shelf Registration Statement,
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).

         (e)  The Company shall, during the Shelf Registration Period, deliver
to each Holder of Conversion Shares included as a selling securityholder in the
Shelf Registration Statement, without charge, as many copies of the Prospectus
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 Conversion Shares in connection with the offering and sale of
the Conversion Shares covered by the Prospectus, or any amendment or supplement
thereto, included in the Shelf Registration Statement.

         (f)  Prior to any public offering of the Conversion Shares pursuant to
the Shelf Registration Statement, the Company shall register or qualify or
cooperate with the Holders of the Conversion Shares included therein and their
respective counsel in connection with the registration or qualification of the
Conversion Shares for offer and sale under the securities or "blue sky" laws of
such states of the United States as any Holder of the Conversion Shares
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 Conversion Shares covered by such Shelf 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 Conversion
Shares to facilitate the timely preparation and delivery of certificates
representing the Conversion Shares to be sold pursuant to any Shelf Registration
Statement free of any restrictive legends and in such denominations and
registered in such names as the Holders may request.

                                        4

<PAGE>

         (h)  Upon the occurrence of any event contemplated by paragraphs (iii)
through (vi) 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 Conversion Shares, 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 Holders in accordance with paragraphs (iii) through (vi) of Section
2(b) above to suspend the use of the Prospectus until the requisite changes to
the Prospectus have been made, then 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 Holders shall have received such amended or supplemented prospectus
pursuant to this Section 2(h).

         (i)  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 Statement 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.

         (j)  The Company may require each Holder of Conversion Shares to be
sold pursuant to the Shelf Registration Statement to furnish to the Company
such information regarding the Holder and the distribution of the Conversion
Shares 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 Conversion Shares of any Holder that unreasonably fails to
furnish such information within a reasonable time after receiving such request.

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

         (l)  The Company shall use commercially reasonable efforts to list the
Conversion Shares covered by the Shelf Registration Statement with the
applicable Eligible Market;

         (m)  The Company shall cooperate with any due diligence investigation
undertaken by the Holders in connection with the sale of Conversion Shares,
including without limitation by making available any documents and information;
provided that the Company will not deliver or make available to any Holder
material, nonpublic information unless such Holder specifically requests in
advance to receive material, nonpublic information.

                                        5

<PAGE>

         (n)  The Company may, after 20 consecutive Trading Days of continuous
effectiveness of the initial Shelf Registration Statement filed and declared
effective pursuant to this Agreement, by written notice to the Holders, suspend
sales under a Shelf Registration Statement after the effective date thereof
and/or require that the Holders immediately cease the sale of shares of Common
Stock pursuant thereto and/or defer the filing of any subsequent Shelf
Registration Statement if:

                   (i)  the Company is engaged in a material merger, acquisition
or sale and the Board of Directors of the Company determines in good faith, by
appropriate resolutions, that, as a result of such activity, (A) it would be
materially detrimental to the Company (other than as relating solely to the
price of the Common Stock) to file a Shelf Registration Statement at such time
and (B) it is in the best interests of the Company to defer proceeding with such
registration at such time, or

                  (ii)  the Company files a Shelf Registration Statement with
the Commission for the purpose of registering under the Securities Act any
securities to be publicly offered and sold by the Company in a bona fide firm
commitment underwritten offering.

         Upon receipt of such notice, each Holder shall immediately discontinue
any sales of Conversion Shares pursuant to such registration until such Holder
has received copies of a supplemented or amended Prospectus or until such Holder
is advised in writing by the Company that the then-current 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. In no
event, however, shall this right be exercised to suspend sales beyond the period
during which (in the good faith determination of the Company's Board of
Directors) the failure to require such suspension would be materially
detrimental to the Company. The Company's rights under this Section 2(n) may be
exercised (A) with respect to clause (i) above, not more than three (3) times
(which may be consecutive) in any twelve-month period and may not be exercised
for a period of more than 30 days each, and (B) with respect to clause (ii)
above, not more than one (1) time and may not be exercised for a period of more
than 20 days in any twelve-month period. In no event may the Company exercise
its rights pursuant to subclauses (A) and (B) above for an aggregate of more
than 90 days. Immediately after the end of any suspension period under this
Section 2(n), the Company shall take all necessary actions (including filing any
required supplemental prospectus) to restore the effectiveness of the applicable
Shelf Registration Statement and the ability of the Holders to publicly resell
their Conversion Shares pursuant to such effective Shelf Registration Statement.

         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 Shelf 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;

                                        6

<PAGE>

                  (iii) all expenses of printing (including 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 Conversion Shares 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 Holders of Conversion Shares
covered by the Shelf Registration Statement, for the reasonable fees and
disbursements of counsel, not to exceed $15,000.

         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 Conversion Shares)
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 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

                                        7

<PAGE>

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
Conversion Shares concerned, to the extent that a Prospectus relating to such
Conversion Shares 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 Conversion Shares 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.

         (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. In no event
shall the liability of any selling Holder hereunder be greater in amount than
the dollar amount of the net proceeds received by such Holder upon the sale of
the Conversion Shares giving rise to such indemnification obligation.

         (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 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,

                                        8

<PAGE>

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 Conversion Shares
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 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 Conversion Shares pursuant to the Shelf Registration Statement and shall
remain in full force and effect,

                                        9

<PAGE>

regardless of any termination or cancellation of this Agreement or any
investigation made by or on behalf of any indemnified party.

         5.    Rule 144. The Company shall use commercially reasonable 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 Rule 144 under the Securities Act. 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 Rule 144 under the
Securities Act. 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 5
shall be deemed to require the Company to register any of its securities
pursuant to the Exchange Act.

         6.    Miscellaneous.

         (a)  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.

         (b)  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 Notes
affected by such amendment, modification, supplement, waiver or consents
(provided that holders of Conversion Shares shall not be deemed holders of
Common Stock, but shall be deemed to be holders of the aggregate principal
amount of Notes from which such Common Stock was converted).

         (c)  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 Notes, at the most current address
         given by such Holder to the Company.

                                       10

<PAGE>

                  (2)  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.

         (d)  Remedies. In the event of a breach by the Company or by a Holder
of any of their obligations under this Agreement, each Holder or the Company,
as the case may be, in addition to being entitled to exercise all rights
granted by law and under this Agreement, including recovery of damages, will be
entitled to specific performance of its rights under this Agreement. The
Company and each Holder agree that monetary damages would not provide adequate
compensation for any losses incurred by reason of a breach by it of any of the
provisions of this Agreement and hereby further agrees that, in the event of
any action for specific performance in respect of such breach, it shall waive
the defense that a remedy at law would be adequate.

         (e)  Third Party Beneficiaries. The Holders shall be third party
beneficiaries to the agreements made hereunder between the Company, on the one
hand, and Anthem, 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.

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

         (f)  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.

                                       11

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

         (h)  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.

         (i)  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.

                                       12

<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 you and the Company in accordance with its terms.

                                  Very truly yours,

                                  CEPHALON, INC.

                                  By: /s/ J. Kevin Buchi
                                      ---------------------------------------
                                      Name: J. Kevin Buchi
                                      Title:Senior Vice President and Chief
                                            Financial Officer

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

ANTHEM INVESTORS, LLC

  By: /s/ Kevin O'Neal
     -------------------------------------
     Name:  Kevin O'Neal
     Title: Authorized Signatory

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