EXHIBIT 31.1


                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002


I, Barry R. Edwards, certify that:


         1.       I have reviewed this Quarterly Report on Form 10-Q/A of Impax
                  Laboratories, Inc.; and

         2.       Based on my knowledge, this report does not contain any untrue
                  statement of 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 report.





May 26, 2004                                    /s/ Barry R. Edwards
                                                ---------------------------
                                                Barry R. Edwards
                                                Chief Executive Officer