1 EXHIBIT 23 CONSENT OF ERNST & YOUNG, INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 33-43981, Form S-8 No. 33-63456, Form S-8 No. 33-82108, Form S-8 No. 33-12611 and Form S-8 No. 333-26735) pertaining to the Stock Option Plans of U.S. Bioscience, Inc. of our report dated February 15, 1999 with respect to the consolidated financial statements of U.S. Bioscience, Inc. included in this Annual Report (Form 10-K) for the year ended December 31, 1998. /s/ ERNST & YOUNG LLP Philadelphia, Pennsylvania March 17, 1999