Exhibit 99.2

                           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, Inc. (the "Company")
on Form 10-Q for the period ending June 30, 2002 as filed with the Securities
and Exchange Commission on the date hereof (the "Report"), I, James M. Frates,
Chief Financial Officer of the Company, certify, pursuant to section 906 of the
Sarbanes-Oxley Act of 2002, 18 U.S.C. section 1350 that, to my knowledge:

     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
Company.

                                        /s/ James M. Frates
                                        James M. Frates
                                        Chief Financial Officer
                                        August 14, 2002