EX-23.1 4 peregrine_exh23-1.txt EXHIBIT 23.1 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statements (Form S-8 No. 333-57046, 2-85628, 33-15102, 33-87662, 33-87664, and 333-17513; Form S-3 No. 333-63777, 333-63773, 333-65125, 333-40716, 333-66350 and 333-71086) of Peregrine Pharmaceuticals, Inc. of our report dated June 21, 2002 (except for Notes 1 and 14, as to which the date is August 13, 2002) with respect to the consolidated financial statements and schedule of Peregrine Pharmaceuticals, Inc. included in the Annual Report (Form 10-K) for the year ended April 30, 2002. /s/ ERNST & YOUNG LLP Orange County, California August 13, 2002