EXHIBIT 4.2



Execution Copy



RESALE REGISTRATION RIGHTS AGREEMENT



between



INDEVUS PHARMACEUTICALS, INC.,



LEHMAN BROTHERS INC.,



and



WACHOVIA CAPITAL MARKETS, LLC



DATED AS OF
JULY 16, 2003



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TABLE OF CONTENTS



|   |  |                                            
|-- |  | -------------------------------------------
|   |  |                                            
|   |  |                                            
|1. |  | Definitions                                
|   |  |                                            
|2. |  | Shelf Registration                         
|   |  |                                            
|3. |  | Additional Amounts                         
|   |  |                                            
|4. |  | Registration Procedures                    
|   |  |                                            
|5. |  | Registration Expenses                      
|   |  |                                            
|6. |  | Indemnification and Contribution           
|   |  |                                            
|7. |  | Rule 144A                                  
|   |  |                                            
|8. |  | Participation in Underwritten Registrations
|   |  |                                            
|9. |  | Miscellaneous                              



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RESALE REGISTRATION RIGHTS
AGREEMENT, dated as of July 16, 2003, among Indevus Pharmaceuticals, Inc., a Delaware corporation (together with any successor entity, herein referred to as the
Company), and Lehman Brothers Inc. and Wachovia Capital Markets, LLC (the Initial Purchasers).



Pursuant to the Purchase Agreement, dated July 10, 2003, between the Company and the Initial Purchasers (the Purchase Agreement), the
Initial Purchasers have agreed to purchase from the Company $60,000,000 (up to $72,000,000 if the initial purchasers exercise in full their option to purchase additional Notes, as set forth in the Purchase Agreement, in full) aggregate principal
amount of 6.25% Convertible Senior Notes due 2008 (the Notes). The Notes initially will be convertible into fully paid, nonassessable common stock, par value $0.001 per share, of the Company (the Common Stock)
on the terms, and subject to the conditions, set forth in the Indenture (as defined herein). To induce the Initial Purchasers to purchase the Notes, the Company has agreed to provide the registration rights set forth in this Agreement pursuant to
the Purchase Agreement.



The parties hereby agree as follows:



1. Definitions. As used in this Agreement, the
following capitalized terms shall have the following meanings:



Additional Amounts: As defined in Section 3(a) hereof.



Additional Amounts Payment Date: Each January 15 and July 15, commencing January 15, 2004.



Affiliate: As such term is defined in Rule 405 under
the Securities Act.



Agreement:
This Resale Registration Rights Agreement, as amended, modified or otherwise supplemented from time to time in accordance with the terms hereof.



Applicable Amount: In respect of shares of Common Stock issued upon conversion of Notes, an amount equal to $1,000 times the
quotient of (x) the number of such shares divided by (y) the prevailing conversion rate, such prevailing conversion rate as determined in accordance with the Indenture.



Blue Sky Application: As defined in Section 6(a) hereof.



Business Day: A day other than a Saturday or Sunday
or any day on which banking institutions in The City of New York are authorized or obligated by law or executive order to close.



Closing Date: The date of this Agreement.



Commission: Securities and Exchange Commission.



Common Stock:As defined in the preamble hereto.



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Effectiveness Period: As defined in Section 2(a)(iii) hereof.



Effectiveness Target Date: As defined in Section
2(a)(ii) hereof.



Exchange Act:
Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission thereunder.



Holder: A Person who owns, beneficially or otherwise, Transfer Restricted Securities.



Holder Questionnaire: As defined in Section 2(b)
hereof.



Included Stock: As defined in
Section 9(c) hereof.



Indemnified
Holder: As defined in Section 6(a) hereof.



Indenture: The Indenture, dated as of July 16, 2003, between the Company and The Bank of New York, as trustee (the Trustee), pursuant to which the Notes are to be issued, as such Indenture is amended, modified or
supplemented from time to time in accordance with the terms thereof.



Initial Purchasers: As defined in the preamble hereto.



Interest Payment Date: Each January 15 and July 15 of each year, commencing January 15, 2004.



Company: As defined in the preamble hereto.



Majority of Holders: Holders holding
more than 50% of the aggregate principal amount at maturity of Notes outstanding; provided that, for purpose of this definition, a holder of shares of Common Stock which constitute Transfer Restricted Securities when issued upon conversion of
the Notes shall be deemed to hold an aggregate principal amount at maturity of Notes (in addition to the principal amount at maturity of Notes held by such holder) equal to $1,000 times the quotient of (x) the number of such shares of Common Stock
received upon conversion of the Notes and then held by such holder divided by (y) the prevailing conversion rate, such prevailing conversion rate as determined in accordance with the Indenture.



NASD: National Association of Securities Dealers,
Inc.



Notes: As defined in the preamble
hereto.



Person: An individual,
partnership, corporation, unincorporated organization, limited liability company, trust, joint venture or a government or agency or political subdivision thereof.



Prospectus: The prospectus included in a Shelf Registration Statement, as amended or supplemented by
any prospectus supplement and by all other amendments



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thereto, including post-effective amendments, and all material incorporated by reference into such Prospectus.



Purchase Agreement: As defined in the preamble
hereto.



Record Holder: With respect to
any Additional Amounts Payment Date, each Person who is a Holder on the record date with respect to the Interest Payment Date on which such Additional Amounts Payment Date shall occur. In the case of a Holder of shares of Common Stock issued upon
conversion of the Notes, Record Holder shall mean each Person who is a Holder of shares of Common Stock that constitute Transfer Restricted Securities on the 15thday preceding the relevant Additional Amounts Payment Date.



Registration Default: As defined in Section 3(a) hereof.



Securities Act: Securities Act of 1933, as amended, and the rules and resolutions of the Commission
thereunder.



Shelf Filing Deadline: As
defined in Section 2(a)(i) hereof.



Shelf
Registration Statement: As defined in Section 2(a)(i) hereof.



Suspension Period. As defined in Section 4(b)(i) hereof.



TIA: Trust Indenture Act of 1939, as amended, and the rules and regulations of the Commission thereunder, in each case, as in
effect on the date the Indenture is qualified under the TIA.



Transfer Restricted Securities: Each Note and each share of Common Stock issued upon conversion of Notes until the earlier of:



(i) the date on which such Note or such share of Common Stock issued upon conversion thereof has been
effectively registered under the Securities Act and disposed of in accordance with the Shelf Registration Statement;



(ii) the date on which such Note or such share of Common Stock issued upon conversion thereof is transferred in compliance with Rule 144
under the Securities Act or may be sold or transferred by a person who is not an Affiliate of the Company pursuant to Rule 144 under the Securities Act (or any other similar provision then in force) without any volume or manner of sale restrictions
thereunder; or



(iii) the date on which such
Note or such share of Common Stock issued upon conversion ceases to be outstanding (whether as a result of redemption, repurchase and cancellation, conversion or otherwise); provided that any Note and any Common Stock issued upon conversion of such
Note that is



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redeemed or repurchased by the Company shall not be deemed Transfer Restricted Securities for purposes of this Agreement upon resale by the Company.



Underwritten Registration or Underwritten
Offering: A registration in which Notes or shares of our Common Stock issued upon conversion of Notes are sold to an underwriter for reoffering to the public.



2. Shelf Registration. The Company shall:



(i) not later than 90 days after the date hereof (the Shelf Filing Deadline), cause to be
filed a registration statement pursuant to Rule 415 under the Securities Act (together with any amendments thereto, and including any documents incorporated by reference therein, the Shelf Registration Statement), which Shelf
Registration Statement shall provide for resales of all Transfer Restricted Securities held by Holders that have provided the information required pursuant to the terms of Section 2(b) hereof;



(ii) use its reasonable best efforts to cause the Shelf
Registration Statement to be declared effective by the Commission not later than 180 days after the date hereof (the Effectiveness Target Date); and



(iii) use its reasonable best efforts to keep the Shelf Registration Statement continuously effective,
supplemented and amended as required by the provisions of Section 4(b) hereof to the extent necessary to ensure that (A) it is available for resales by the Holders of Transfer Restricted Securities entitled to the benefit of this Agreement and (B)
conforms with the requirements of this Agreement and the Securities Act for a period (the Effectiveness Period) of:



(1) two years following the last date of original issuance of Notes; or



(2) such shorter period that will terminate when (x) all of the Holders of Transfer Restricted Securities
are able to sell all Transfer Restricted Securities immediately without restriction pursuant to Rule 144(k) under the Securities Act or any successor rule thereto, (y) when all Transfer Restricted Securities have ceased to be outstanding (whether as
a result of redemption, repurchase and cancellation, conversion or otherwise) or (z) all Transfer Restricted Securities registered under the Shelf Registration Statement have been sold.



(b) To have its Transfer Restricted Securities included in the Shelf Registration Statement pursuant to this Agreement, each
Holder shall complete the Selling Securityholder Notice and Questionnaire, the form of which is contained in Annex A to the Offering Memorandum relating to the Notes (the Questionnaire). The Company shall mail the Questionnaire
not less than 20 Business Days prior to the time the Company intends in good faith to have the Shelf Registration Statement declared effective by the Commission. Upon receipt of a written request for additional information from the Company, each
Holder who intends to be named as a selling securityholder in the Shelf Registration Statement shall furnish



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to the Company in writing, within 20 Business Days after such Holders receipt of such request, such additional information regarding such Holder and
the proposed distribution by such Holder of its Transfer Restricted Securities, in connection with the Shelf Registration Statement or Prospectus or Preliminary Prospectus included therein and in any application to be filed with or under state
securities law, as the Company may reasonably request. In connection with all such requests for information from Holders of Transfer Restricted Securities, the Company shall notify such Holders of the requirements set forth in this paragraph
regarding their obligation to provide the information requested pursuant to this Section. Holders who have not delivered a Questionnaire prior to the effectiveness of the Shelf Registration Statement may receive a Questionnaire from the Company upon
request. Upon receipt of such a completed Questionnaire from a Holder following the effectiveness of the Shelf Registration Statement, the Company shall, as promptly as reasonably practicable, file such amendments to the Shelf Registration Statement
or supplements to a related Prospectus as are necessary to permit such Holder to transfer its Transfer Restricted Securities pursuant to the Shelf Registration Statement. Each Holder as to which the Shelf Registration Statement is being effected
agrees to furnish promptly to the Company all information required to be disclosed in order to make information previously furnished to the Company by such Holder not materially misleading.



3. Additional Amounts.



(a) If:



(i) the Shelf Registration Statement is not filed with the Commission prior to or on the Shelf Filing
Deadline;



(ii) the Shelf Registration
Statement has not been declared effective by the Commission prior to or on the Effectiveness Target Date;



(iii) except as provided in Section 4(b)(i) hereof, the Shelf Registration Statement is filed and declared effective but, during the
Effectiveness Period, shall thereafter cease to be effective or fail to be usable for its intended purpose without being succeeded within two Business Days by a post-effective amendment to the Shelf Registration Statement, a supplement to the
Prospectus or a report filed with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act that cures such failure and, in the case of a post-effective amendment, is itself immediately declared effective; or



(iv) (A) prior to or on the 60thor 90thday, as the case may be, of any Suspension Period, such suspension has not been terminated or (B) Suspension Periods exceed an aggregate of 120 days in any 360 day period,



(each such event referred to in foregoing clauses (i) through (iv), a Registration
Default), the Company hereby agrees to pay additional amounts (Additional Amounts) with respect to the Transfer Restricted Securities from and including the day following the Registration Default to but excluding the day
on which the Registration Default has been cured, accruing at a rate:



(A) in respect of the Notes, to each holder of Notes, (x) with respect to the first 90-day period during which a Registration Default shall have occurred



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and be continuing, equal to 0.25% per annum of the principal amount of the Notes, and (y) with respect to the period commencing on the 91stday following the day the Registration Default shall have occurred and be continuing, equal to 0.50% per annum of the
principal amount of the Notes; provided that in no event shall Additional Amounts accrue at a rate per year exceeding 0.50% of the Applicable Amount of the Notes; and



(B) in respect of any shares of Common Stock, to each holder of shares of Common Stock issued upon
conversion of Notes, (x) with respect to the first 90-day period in which a Registration Default shall have occurred and be continuing, equal to 0.25% per annum of the Applicable Amount of the converted Notes, and (y) with respect to the period
commencing the 91stday following the day the Registration Default shall have occurred and be continuing, equal to
0.50% per annum of the Applicable Amount of the converted Notes; provided that in no event shall Additional Amounts accrue at a rate per year exceeding 0.50% of the Applicable Amount of the converted Notes.



(b) All accrued Additional Amounts shall be paid in arrears to Record Holders
by the Company on each Additional Amounts Payment Date by wire transfer of immediately available funds or by federal funds check. Following the cure of all Registration Defaults relating to any particular Security or share of Common Stock, the
accrual of Additional Amounts with respect to such Security or share of Common Stock will cease. The Company agrees to deliver all notices, certificates and other documents contemplated by the Indenture in connection with the payment of Additional
Amounts.



All obligations of the Company set forth in this
Section 3 that are outstanding with respect to any Transfer Restricted Security at the time such security ceases to be a Transfer Restricted Security shall survive until such time as all such obligations with respect to such Transfer Restricted
Security shall have been satisfied in full.



The Additional
Amounts set forth above shall be the exclusive monetary remedy available to the Holders of Transfer Restricted Securities for such Registration Default.



4. Registration Procedures.



(a) In connection with the Shelf Registration Statement, the Company shall comply with all the provisions of Section 4(b) hereof and shall use its
reasonable best efforts to effect such registration to permit the sale of the Transfer Restricted Securities being sold in accordance with the intended method or methods of distribution thereof, and pursuant thereto, shall prepare and file with the
Commission a Shelf Registration Statement relating to the registration on any appropriate form under the Securities Act.



(b) In connection with the Shelf Registration Statement and any Prospectus required by this Agreement to permit the sale or resale of Transfer Restricted
Securities, the Company shall:



(i) Use its
reasonable best efforts to keep the Shelf Registration Statement continuously effective during the Effectiveness Period; upon the



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occurrence of any event or the existence of any fact that would cause the Shelf Registration Statement or the Prospectus contained therein, in either case
including any document incorporated by reference therein, (A) to contain a material misstatement or omission or (B) not be effective and usable for resale of Transfer Restricted Securities during the Effectiveness Period, the Company shall file
promptly an appropriate amendment to the Shelf Registration Statement, a supplement to the Prospectus or a report filed with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act, in the case of clause (A), correcting any
such misstatement or omission, and, in the case of either clause (A) or (B), use its reasonable best efforts to cause such amendment to be declared effective and the Shelf Registration Statement and the related Prospectus to become usable for their
intended purposes as soon as practicable thereafter. Notwithstanding the foregoing, the Company may suspend the effectiveness of the Shelf Registration Statement by written notice to the Holders for a period not to exceed an aggregate of 60 days in
any 90-day period (each such period, a Suspension Period) if:



(x) an event occurs and is continuing as a result of which the Shelf Registration Statement would, in the Companys reasonable
judgment, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; and



(y) the Company reasonably determines that the disclosure of such event at such time would have a material
adverse effect on the business of the Company (and its subsidiaries, if any, taken as a whole);



provided that in the event the disclosure relates to a previously undisclosed proposed or pending material business transaction, the disclosure of
which would impede the Companys ability to consummate such transaction, the Company may extend a Suspension Period from 60 days to 90 days; provided, however, that Suspension Periods shall not exceed an aggregate of 120 days in any
360-day period.



(ii) Prepare and file with
the Commission such amendments and post-effective amendments to the Shelf Registration Statement as may be necessary to keep the Shelf Registration Statement effective during the Effectiveness Period; cause the Prospectus to be supplemented by any
required Prospectus supplement, and as so supplemented to be filed pursuant to Rule 424 under the Securities Act, and to comply fully with the applicable provisions of Rules 424 and 430A under the Securities Act in a timely manner; and comply with
the provisions of the Securities Act with respect to the disposition of all securities covered by the Shelf Registration Statement during the applicable period in accordance with the intended method or methods of distribution by the sellers thereof
set forth in the Shelf Registration Statement or supplement to the Prospectus.



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(iii) Advise the underwriter(s), if any, and selling Holders promptly (but in any event
within two Business Days) and, if requested by such Persons, to confirm such advice in writing:



(A) when the Prospectus or any Prospectus supplement or post-effective amendment has been filed, and, with respect to the Shelf
Registration Statement or any post-effective amendment thereto, when the same has become effective,



(B) of any request by the Commission for amendments to the Shelf Registration Statement or amendments or supplements to the Prospectus or
for additional information relating thereto,



(C) of the issuance by the Commission of any stop order suspending the effectiveness of the Shelf Registration Statement under the Securities Act or of the suspension by any state securities commission of the qualification of the Transfer
Restricted Securities for offering or sale in any jurisdiction, or the initiation of any proceeding for any of the preceding purposes, or



(D) of the existence of any fact or the happening of any event, during the Effectiveness Period, that makes any statement of a material
fact made in the Shelf Registration Statement, the Prospectus, any amendment or supplement thereto, or any document incorporated by reference therein untrue, or that requires the making of any additions to or changes in the Shelf Registration
Statement or the Prospectus in order to make the statements therein not misleading.



If at any time the Commission shall issue any stop order suspending the effectiveness of the Shelf Registration Statement, or any state securities commission or other regulatory authority shall issue an order
suspending the qualification or exemption from qualification of the Transfer Restricted Securities under state securities or Blue Sky laws, the Company shall use its reasonable best efforts to obtain the withdrawal or lifting of such order at the
earliest possible time and will provide to the Initial Purchasers and each Holder who is named in the Shelf Registration Statement prompt notice of the withdrawal of any such order.



(iv) Furnish to each of the selling Holders and each of the underwriter(s), if any, before filing with the
Commission, a copy of the Shelf Registration Statement and copies of any Prospectus included therein or any amendments or supplements to the Shelf Registration Statement or Prospectus (other than documents incorporated by reference after the initial
filing of the Shelf Registration Statement), which documents will be subject to the review of such holders and underwriter(s), if any, for a period of at least ten Business Days (in the case of the Shelf Registration Statement and Prospectus) and
two Business Days (in the case of any amendment or supplement thereto), and the Company



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will not file the Shelf Registration Statement or Prospectus or any amendment or supplement to the Shelf Registration Statement or Prospectus (other than
documents incorporated by reference) to which a selling Holder of Transfer Restricted Securities covered by the Shelf Registration Statement or the underwriter(s), if any, shall reasonably object prior to the filing thereof. A selling Holder or
underwriter, if any, shall be deemed to have reasonably objected to such filing if the Shelf Registration Statement, amendment, Prospectus or supplement, as applicable, as proposed to be filed, contains a material misstatement or omission.



(v) Make available at reasonable times for
inspection by one or more representatives of the selling Holders, designated in writing by a Majority of Holders whose Transfer Restricted Securities are included in the Shelf Registration Statement, any underwriter participating in any distribution
pursuant to the Shelf Registration Statement, and any attorney or accountant retained by such selling Holders or any of the underwriter(s), all financial and other records, pertinent corporate documents and properties of the Company as shall be
reasonably necessary to enable them to exercise any applicable due diligence responsibilities, and cause the Companys officers, directors, managers and employees to supply all information reasonably requested by any such representative or
representatives of the selling Holders, underwriter, attorney or accountant in connection with the Shelf Registration Statement after the filing thereof and before its effectiveness, provided, however, that any information designated by the
Company as confidential at the time of delivery of such information shall be kept confidential by the recipient thereof.



(vi) If requested by any selling Holders or the underwriter(s), if any, promptly incorporate in the Shelf Registration Statement or
Prospectus, pursuant to a supplement or post-effective amendment if necessary, such information as such selling Holders and underwriter(s), if any, may reasonably request to have included therein, including, without limitation: (1) information
relating to the Plan of Distribution of the Transfer Restricted Securities, (2) information with respect to the principal amount of Notes or number of shares of Common Stock being sold to such underwriter(s), (3) the purchase price being
paid therefor and (4) any other terms of the offering of the Transfer Restricted Securities to be sold in such offering; and make all required filings of such Prospectus supplement or post-effective amendment as soon as reasonably practicable after
the Company is notified of the matters to be incorporated in such Prospectus supplement or post-effective amendment.



(vii) Furnish to each selling Holder and each of the underwriter(s), if any, without charge, at least one copy of the Shelf Registration
Statement, as first filed with the Commission, and of each amendment thereto (and any documents incorporated by reference therein or exhibits thereto (or exhibits incorporated in such exhibits by reference) as such Person may request).



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(viii) Deliver to each selling Holder and each of the underwriter(s), if any, without
charge, as many copies of the Prospectus (including each preliminary prospectus) and any amendment or supplement thereto as such Persons reasonably may request; subject to any notice by the Company in accordance with this Section 4(b) of the
existence of any fact or event of the kind described in Section 4(b)(iii)(D), the Company hereby consents to the use of the Prospectus and any amendment or supplement thereto by each of the selling Holders and each of the underwriter(s), if any, in
connection with the offering and the sale of the Transfer Restricted Securities covered by the Prospectus or any amendment or supplement thereto.



(ix) The Company shall:



(A) upon request, furnish to each selling Holder and each underwriter, if any, in such substance and scope as they may reasonably request
and as are customarily made by issuers to underwriters in primary underwritten offerings for selling security holders, upon the date of closing of any sale of Transfer Restricted Securities in an Underwritten Registration:



(1) a certificate, dated the date of such closing, signed
by the Chief Financial Officer of the Company confirming, as of the date thereof, matters of the type set forth in Section 5(f) of the Purchase Agreement and such other matters as such parties may reasonably request;



(2) opinions, each dated the date of such closing, of
counsel to the Company covering such of the matters as are customarily covered in legal opinions to underwriters in connection with underwritten offerings of securities; and



(3) customary comfort letters, dated the date of such closing, from the Companys independent
accountants in the customary form and covering matters of the type customarily covered in comfort letters to underwriters in connection with underwritten offerings of securities;



(B) set forth in full in the underwriting agreement, if any, indemnification provisions and procedures which
provide rights no less protective than those set forth in Section 6 hereof with respect to all parties to be indemnified; and



(C) deliver such other documents and certificates as may be reasonably requested by such parties to evidence compliance with clause (A)
above and with any customary conditions contained in the underwriting agreement or other agreement entered into by the selling Holders pursuant to this clause (ix).



(x) Before any public offering of Transfer Restricted Securities, cooperate with the selling Holders, the
underwriter(s), if any, and their respective counsel in connection with the registration and qualification of the Transfer Restricted Securities under the securities or Blue Sky laws of such jurisdictions in



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the United States as the selling Holders or underwriter(s), if any, may reasonably request and do any and all other acts or things necessary or advisable to
enable the disposition in such jurisdictions of the Transfer Restricted Securities covered by the Shelf Registration Statement; provided, however, that the Company shall not be required (A) to register or qualify as a foreign corporation or a
dealer of securities where it is not now so qualified or to take any action that would subject it to the service of process in any jurisdiction where it is not now so subject or (B) to subject itself to taxation in any such jurisdiction if it is not
now so subject.



(xi) Cooperate with the
selling Holders and the underwriter(s), if any, to facilitate the timely preparation and delivery of certificates representing Transfer Restricted Securities to be sold and not bearing any restrictive legends (unless required by applicable
securities laws); and enable such Transfer Restricted Securities to be in such denominations and registered in such names as the Holders or the underwriter(s), if any, may request at least two Business Days before any sale of Transfer Restricted
Securities made by such underwriter(s).



(xii)
Use its reasonable best efforts to cause the Transfer Restricted Securities covered by the Shelf Registration Statement to be registered with or approved by such other U.S. governmental agencies or authorities as may be necessary to enable the
seller or sellers thereof or the underwriter(s), if any, to consummate the disposition of such Transfer Restricted Securities.



(xiii) Provide CUSIP numbers for all Transfer Restricted Securities not later than the effective date of the Shelf Registration Statement
and provide the Trustee under the Indenture with certificates for the Notes that are in a form eligible for deposit with The Depository Trust Company.



(xiv) Cooperate and assist in any filings required to be made with the NASD and in the performance of any due diligence investigation by
any underwriter that is required to be retained in accordance with the rules and regulations of the NASD.



(xv) Otherwise use its reasonable best efforts to comply with all applicable rules and regulations of the Commission and all reporting
requirements under the Exchange Act.



(xvi)
Cause the Indenture to be qualified under the TIA not later than the effective date of the Shelf Registration Statement required by this Agreement, and, in connection therewith, cooperate with the Trustee and the holders of Notes to effect such
changes to the Indenture as may be required for such Indenture to be so qualified in accordance with the terms of the TIA; and execute and use its reasonable best efforts to cause the Trustee thereunder to execute all documents that may be required
to effect such changes and all other forms and documents required to be filed with the Commission to enable such Indenture to be so qualified in a timely manner.



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(xvii) Cause all shares of Common Stock covered by the Shelf Registration Statement to be
listed or quoted, as the case may be, on each securities exchange or automated quotation system on which similar securities issued by the Company are then listed or quoted.



(xviii) Provide to each Holder upon written request each document filed with the Commission pursuant to the
requirements of Section 13 and Section 15 of the Exchange Act after the effective date of the Shelf Registration Statement.



(xix) If requested by the underwriter(s), make appropriate officers of the Company available to the underwriter(s) for meetings with
prospective purchasers of the Transfer Restricted Securities and prepare and present to potential investors customary road show or marketing materials in a manner consistent with other new issuances of other securities similar to the
Transfer Restricted Securities.



(c) Each Holder agrees by
acquisition of a Transfer Restricted Security that, upon receipt of any notice from the Company of the existence of any fact of the kind described in Section 4(b)(iii)(D) hereof, such Holder will, and will use its reasonable best efforts to cause
any underwriter(s) in an Underwritten Offering to, forthwith discontinue disposition of Transfer Restricted Securities pursuant to the Shelf Registration Statement until:



(i) such Holder has received copies of the supplemented or amended Prospectus contemplated by Section
4(b)(i) and 4(b)(viii) hereof; or



(ii) such
Holder is advised in writing by the Company that the use of the Prospectus may be resumed, and has received copies of any additional or supplemental filings that are incorporated by reference in the Prospectus.



If so directed by the Company, each Holder will deliver to the Company (at the Companys
expense) all copies, other than permanent file copies then in such Holders possession, of the Prospectus covering such Transfer Restricted Securities that was current at the time of receipt of such notice of suspension.



5. Registration Expenses. All expenses incident to the
Companys performance of or compliance with this Agreement shall be borne by the Company regardless of whether a Shelf Registration Statement becomes effective, including, without limitation:



(i) all registration and filing fees and expenses (including
filings made by any Initial Purchasers or Holders with the NASD);



(ii) all fees and expenses of compliance with federal securities and state Blue Sky or securities laws;



(iii) all expenses of printing (including printing of Prospectuses and certificates for the Common Stock to be issued upon conversion of
the Notes) and the Companys expenses for messenger and delivery services and telephone;



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(iv) all fees and disbursements of counsel to the Company and, subject to Section 5(b)
below, the Holders of Transfer Restricted Securities;



(v) all application and filing fees in connection with listing (or authorizing for quotation) the Common Stock 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 shall bear its internal expenses (including, without limitation, all salaries and expenses of its officers and employees performing legal,
accounting or other 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, including any amendment or supplement thereto, and any other documents
delivered to any Holders, the Company shall reimburse the Initial Purchasers and the Holders of Transfer Restricted Securities being registered pursuant to the Shelf Registration Statement, as applicable, for the reasonable fees and disbursements of
not more than one counsel, which shall be chosen by a Majority of Holders for whose benefit the Shelf Registration Statement is being prepared.



6. Indemnification and Contribution.



(a) The Company shall indemnify and hold harmless each Holder, such Holders officers, directors, partners and employees and each person, if any, who
controls such Holder within the meaning of the Securities Act (each, an Indemnified Holder), from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof (including, but not limited to, any
loss, claim, damage, liability or action relating to resales of the Transfer Restricted Securities), to which such Indemnified Holder may become subject, insofar as any such loss, claim, damage, liability or action arises out of, or is based upon:



(i) any untrue statement or alleged untrue
statement of a material fact contained in (A) the Shelf Registration Statement or Prospectus or any amendment or supplement thereto or (B) any blue sky application or other document or any amendment or supplement thereto prepared or executed by the
Company (or based upon written information furnished by or on behalf of the Company expressly for use in such blue sky application or other document or amendment on supplement) filed in any jurisdiction specifically for the purpose of qualifying any
or all of the Transfer Restricted Securities under the securities law of any state or other jurisdiction (such application or document being hereinafter called a Blue Sky Application); or



(ii) the omission or alleged omission to state in the Shelf
Registration Statement, Prospectus or any amendment or supplement thereto, or in any Blue Sky Application, any material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which
they were made, not misleading,



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and shall reimburse each Indemnified Holder promptly upon demand for any legal or other expenses reasonably incurred by such Indemnified Holder in connection
with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any
such loss, claim, damage, liability or action arises out of, or is based upon, (A) any untrue statement or alleged untrue statement or omission or alleged omission made in the Shelf Registration Statement or Prospectus or amendment or supplement
thereto or Blue Sky Application or other document referred to in Section 6(a)(i) hereof in reliance upon and in conformity with written information furnished to the Company by or on behalf of such Holder specifically for inclusion therein and (B)
the failure of the Indemnified Holder to deliver in a corrective amendment or supplement after delivery by the Company to such Indemnified Holder of such amendment or supplement. The foregoing indemnity agreement is in addition to any liability
which the Company may otherwise have to any Indemnified Holder.



(b) Each Holder, severally and not jointly, shall indemnify and hold harmless the Company, its officers, directors and employees and each person, if any, who controls the Company within the meaning of the Securities Act, from and against
any loss, claim, damage or liability, joint or several, or any action in respect thereof, to which the Company or any such officer, director, employee or controlling person may become subject, insofar as any such loss, claim, damage or liability or
action arises out of, or is based upon:



(i)
any untrue statement or alleged untrue statement of any material fact contained in the Shelf Registration Statement or Prospectus or any amendment or supplement thereto or any Blue Sky Application or other document referred to in Section 6(a)(i)
hereof; or



(ii) the omission or the alleged
omission to state in the Shelf Registration Statement, Prospectus or any amendment or supplement thereto, or in any Blue Sky Application or other document referred to in Section 6(a)(i) hereof, 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,



but in each case only to the extent that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity
with written information furnished to the Company by or on behalf of such Holder (or its related Indemnified Holder) specifically for use therein, and shall reimburse the Company and any such officer, employee or controlling person promptly upon
demand for any legal or other expenses reasonably incurred by the Company or any such officer, employee or controlling person in connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or
action as such expenses are incurred. The foregoing indemnity agreement is in addition to any liability which any Holder may otherwise have to the Company and any such officer, employee or controlling person.



(c) Promptly after receipt by an indemnified party under this Section 6 of
notice of any claim or the commencement of any action, the indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under this Section 6, notify the indemnifying party in writing of the claim or the
commencement of that action; provided,



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however, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have under this Section 6 except to
the extent it has been materially prejudiced by such failure and, provided, further, that the failure to notify the indemnifying party shall not relieve it from any liability which it may have to an indemnified party otherwise than under this
Section 6. If any such claim or action shall be brought against an indemnified party, and the indemnified party shall notify the indemnifying party thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it
wishes, jointly with any other similarly notified indemnifying party, to assume the defense thereof with counsel satisfactory to the indemnified party. After notice from the indemnifying party to the indemnified party of its election to assume the
defense of such claim or action, the indemnifying party shall not be liable to the indemnified party under this Section 6 for any legal or other expenses subsequently incurred by the indemnified party in connection with the defense thereof other
than reasonable costs of investigation; provided, however, that a Majority of Holders shall have the right to employ a single counsel to represent jointly a Majority of Holders and their respective officers, directors, partners, employees and
controlling persons who may be subject to liability arising out of any claim in respect of which indemnity may be sought by a Majority of Holders against the Company under this Section 6, and, if a Majority of Holders seeking indemnification shall
have been advised by legal counsel that there may be one or more legal defenses available to them and their respective directors, officers, partners, employees and controlling persons that are different from or additional to those available to the
Company and its officers, directors, employees and controlling persons, the fees and expenses of a single separate counsel shall be paid by the Company. No indemnifying party shall:



(i) without the prior written consent of the indemnified parties (which consent shall not be unreasonably
withheld) settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the
indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action, suit or
proceeding, or



(ii) be liable for any
settlement of any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with its written consent or if there be a final judgment for the plaintiff in any such action, the indemnifying
party agrees to indemnify and hold harmless any indemnified party from and against any loss or liability by reason of such settlement or judgment.



(d) If the indemnification provided for in this Section 6 shall for any reason be unavailable or insufficient to hold harmless an indemnified party under
Section 6(a) or 6(b) in respect of any loss, claim, damage or liability (or action in respect thereof) referred to therein, each indemnifying party shall, in lieu of indemnifying such indemnified party, contribute to the amount paid or payable by
such indemnified party as a result of such loss, claim, damage or liability (or action in respect thereof):



(i) in such proportion as is appropriate to reflect the relative benefits received by the Company from the offering and sale of the
Transfer Restricted Securities



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on the one hand and a Holder with respect to the sale by such Holder of the Transfer Restricted Securities on the other, or



(ii) if the allocation provided by clause (6)(d)(i) is not
permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause 6(d)(i) but also the relative fault of the Company on the one hand and the Holders on the other in connection with the
statements or omissions or alleged statements or alleged omissions that resulted in such loss, claim, damage or liability (or action in respect thereof), as well as any other relevant equitable considerations.



The relative benefits received by the Company on the one hand and a Holder on the other with
respect to such offering and such sale shall be deemed to be in the same proportion as the total net proceeds from the offering of the Notes purchased under the Purchase Agreement (before deducting expenses) received by the Company on the one hand,
bear to the total proceeds received by such Holder with respect to its sale of Transfer Restricted Securities on the other. The relative fault of the parties shall be determined by reference to 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 the Holders on the other, the intent of the parties and their relative knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Company and each Holder agree that it would not be just and equitable if the amount of contribution pursuant to this Section 6(d) were determined by pro rata allocation or by
any other method of allocation that does not take into account the equitable considerations referred to in the first sentence of this paragraph (d). The amount paid or payable by an indemnified party as a result of the loss, claim, damage or
liability, or action in respect thereof, referred to above in this Section 6 shall be deemed to include, for purposes of this Section 6, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or
defending or preparing to defend any such action or claim. Notwithstanding the provisions of this Section 6, no Holder shall be required to contribute any amount in excess of the amount by which the total price at which the Transfer Restricted
Securities purchased by it were resold exceeds the amount of any damages which such Holder has otherwise been required to pay by reason of any 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. The Holders obligations to contribute as provided in this
Section 6(d) are several and not joint.



7. Rule
144A. In the event the Company is not subject to Section 13 or 15(d) of the Exchange Act, the Company hereby agrees with each Holder, for so long as any Transfer Restricted Securities remain outstanding, to make available to any Holder or
beneficial owner of Transfer Restricted Securities in connection with any sale thereof and any prospective purchaser of such Transfer Restricted Securities from such Holder or beneficial owner, the information required by Rule 144A(d)(4) under the
Securities Act in order to permit resales of such Transfer Restricted Securities pursuant to Rule 144A.



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8. Participation in Underwritten Registrations. No Holder may participate in any
Underwritten Registration hereunder unless such Holder:



(i) agrees to sell such Holders Transfer Restricted Securities on the basis provided in any underwriting arrangements approved by the Persons entitled hereunder to approve such arrangements; and



(ii) completes and executes all reasonable questionnaires,
powers of attorney, indemnities, underwriting agreements, lock-up letters and other documents required under the terms of such underwriting arrangements.



9. Miscellaneous.



(a) Remedies. The Company acknowledges and agrees that any failure by the Company to comply with its obligations under Section 2 hereof may
result in material irreparable injury to the Initial Purchasers or the Holders for which there is no adequate remedy at law, that it will not be possible to measure damages for such injuries precisely and that, in the event of any such failure, the
Initial Purchasers or any Holder may obtain such relief as may be required to specifically enforce the Companys obligations under Section 2 hereof. The Company further agrees to waive the defense in any action for specific performance that a
remedy at law would be adequate.



(b) Actions Affecting
Transfer Restricted Securities. The Company shall not, directly or indirectly, take any action with respect to the Transfer Restricted Securities as a class that would adversely affect the ability of the Holders of Transfer Restricted
Securities to include such Transfer Restricted Securities in a registration undertaken pursuant to this Agreement.



(c) 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; provided, however, that the Company shall be permitted to grant registration rights to the holder of up to
$350,000 of Common Stock of the Company (the Included Stock) which may be included in the Shelf Registration Statement provided that the inclusion of the Included Stock does not prejudice in any material respect the rights of the Holders
of Transfer Restricted Securities arising under this Agreement. In addition, other than in connection with the issuance of the Included Stock, the Company shall not grant to any of its security holders (other than the Holders of Transfer Restricted
Securities in such capacity) the right to include any of its securities in the Shelf Registration Statement provided for in this Agreement other than the Transfer Restricted Securities. The Company has not previously entered into any agreement
(which has not expired or been terminated) granting any registration rights with respect to its securities to any Person which rights conflict with the provisions hereof.



(d) Amendments and Waivers. This Agreement may not be amended, modified or supplemented, and waivers or
consents to or departures from the provisions hereof may not be given, unless the Company has obtained the written consent of a Majority of Holders or such greater percentage of the Holders as required by the Indenture.



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(e) Notices. All notices and other communications provided for or permitted hereunder shall
be made in writing by hand-delivery, first-class mail (registered or certified, return receipt requested), telex, facsimile transmission, or air courier guaranteeing overnight delivery:



(i) if to a Holder, at the address set forth on the records of the registrar under the Indenture or the
transfer agent of the Common Stock, as the case may be; and



(ii) if to the Company:



Indevus Pharmaceuticals, Inc.

99 Hayden Avenue

Lexington, MA 02421

Attention: Mark S. Butler

Fax: (781) 861-0253

Telephone: (781) 402-3402



With a copy to:



Burns & Levinson LLP

125 Summer Street

Boston, MA 02110

Attention: Josef Volman

Fax: (617) 345-3299

Telephone: (617) 345-3895



All such notices and communications shall be deemed to have been duly given:
at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when answered back, if telexed; when receipt acknowledged, if transmitted by facsimile; and on the next
Business Day, if timely delivered to an air courier guaranteeing overnight delivery.



(f) Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the successors and assigns of each of the parties, including without limitation and without the need for an
express assignment, subsequent Holders of Transfer Restricted Securities; provided, however, that (i) this Agreement shall not inure to the benefit of or be binding upon a successor or assign of a Holder unless and to the extent such
successor or assign acquired Transfer Restricted Securities from such Holder and (ii) nothing contained herein shall be deemed to permit any assignment, transfer or other disposition of Transfer Restricted Securities in violation of the terms of the
Purchase Agreement or the Indenture. If any transferee of any Holder shall acquire Transfer Restricted Securities, in any manner, whether by operation of law or otherwise, such Transfer Restricted Securities shall be held subject to all of the terms
of this Agreement, and by taking and holding such Transfer Restricted Securities such person shall be conclusively deemed to have agreed to be bound by and to perform all of the terms and provisions of this Agreement.



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



(h) Securities Held by the Company or Its Affiliates. Whenever the consent or approval of Holders of a
specified percentage of Transfer Restricted Securities is required hereunder, Transfer Restricted Securities held by the Company or its Afiliates shall not be counted in determining whether such consent or approval was given by the Holders of such
required percentage.



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



(j) Governing Law. This Agreement shall be governed by, and construed in accordance with, the law of the State of New York.



(k) 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.



(l) Entire
Agreement. This Agreement is intended by the parties as a final expression of their agreement and intended to be a complete and exclusive statement of the agreement and understanding of the parties hereto in respect of the subject matter
contained herein. There are no restrictions, promises, warranties or undertakings, other than those set forth or referred to herein with respect to the registration rights granted by the Company with respect to the Transfer Restricted Securities.
This Agreement supersedes all prior agreements and understandings between the parties with respect to such subject matter.



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IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date first written above.



INDEVUS PHARMACEUTICALS, INC.By

/s/    GLENN L. COOPERName: Glenn L. CooperTitle: President and Chief Executive OfficerLEHMAN BROTHERS INC. WACHOVIA CAPITAL MARKETS, LLCBY:

LEHMAN BROTHERS INC.By

/s/    C.M. CAREYC.M. Carey Authorized Representative




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