Exhibit 31.1

                                CERTIFICATION OF
                             CHIEF EXECUTIVE OFFICER


I, Barry R. Edwards, Chief Executive Officer, certify that:

     1.  I have reviewed this quarterly report on Form 10-Q/A for the three
         months ended September 30, 2002 of Impax Laboratories, Inc.

     2.  Based on my knowledge, this quarterly report amendment 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.




                                              /s/ Barry R. Edwards
                                            -------------------------
                                               Barry R. Edwards
                                            Chief Executive Officer


                                                 March 15, 2005
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