EXHIBIT 23 (a) Independent Auditors' Consent We consent to the incorporation by reference in Registration Statement Nos. 33-64451 and 333-32132 on Form S-8 and in Registration Statements Nos. 33-61087, 333-5921, 333-18041, and 333-61993 on Form S-3 of our report dated March 7, 2000 (which expresses an unqualified opinion and includes an explanatory paragraph relating to the Company's ability to continue as a going concern) appearing in this Annual Report on Form 10-K of OXIS International, Inc. for the year ended December 31, 1999. DELOITTE & TOUCHE LLP Portland, Oregon March 29, 2000