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                           CERTIFICATIONS Exhibit 31.1

I, Richard F. Pops, certify that:

1.       I have reviewed this quarterly report on Form 10-Q of Alkermes Clinical
Partners, L.P.;

2.       Based on my  knowledge,  this  quarterly  report  does not  contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
quarterly report;

3.       Based on my knowledge, the financial statements, and other financial
information included in this quarterly report, fairly present in all material
respects the financial condition, results of operations and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

4.       The other certifying officer of the General Partner and I are
responsible for establishing and maintaining disclosure controls and procedures
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant
and we have:

         a.       designed such disclosure controls and procedures, or caused
                  such disclosure controls and procedures to be designed under
                  our supervision, to ensure that material information relating
                  to the registrant, including its consolidated subsidiaries, is
                  made known to us by others within those entities, particularly
                  during the period in which this quarterly report is being
                  prepared;

         b.       evaluated the effectiveness of the registrant's disclosure
                  controls and procedures and presented in this quarterly report
                  our conclusions about the effectiveness of the disclosure
                  controls and procedures, as of the end of the period covered
                  by this quarterly report based on such evaluation; and

         c.       disclosed in this quarterly report any change in the
                  Registrant's internal control over financial reporting that
                  occurred during the Registrant's most recent fiscal quarter
                  that has materially affected, or is reasonably likely to
                  materially affect, the Registrant's internal control over
                  financial reporting;

5.       The other certifying officer of the General Partner and I have
disclosed, based on our most recent evaluation of internal control over
financial reporting, to the registrant's auditors and the audit committee of
registrant's board of directors (or persons performing the equivalent
functions):

         a.       all significant deficiencies and material weaknesses in the
                  design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  registrant's ability to record, process, summarize and report
                  financial information; and

         b.       any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the
                  registrant's internal control over financial reporting.

Date:  November 13, 2003
                                         /s/ Richard F. Pops
                                         --------------------------------------
                                         Richard F. Pops
                                         President and Chief Executive Officer
                                         of Alkermes Development Corporation II,
                                         the General Partner of the Registrant