Exhibit 99.1

                            CERTIFICATION PURSUANT TO

                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002,

                             18 U.S.C. SECTION 1350

            In connection with the Quarterly Report of Alkermes Clinical
Partners, L.P. (the "Partnership") on Form 10-Q for the period ending September
30, 2002 as filed with the Securities and Exchange Commission on the date hereof
(the "Report"), I, Richard F. Pops, President and Chief Executive Officer of
Alkermes Development Corporation II, General Partner of the Partnership,
certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,18 U.S.C.
Section 1350 that:

      1. The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

      2. The information contained in the Report fairly presents, in all
material respects, the financial condition and result of operations of the
Partnership.



                                           /s/ Richard F. Pops
                                           Richard F. Pops,
                                           President and Chief Executive
                                           Officer of Alkermes Development
                                           Corporation II, General Partner of
                                           Alkermes Clinical Partners, L.P.
                                           November 14, 2002