1 EXHIBIT 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statements No. 33-32805 and No. 33-32970 of Zila, Inc. on Form S-8 and Registration Statements No. 33-46239, No. 333-06019, No. 333-00645 and No. 333-31651 of Zila, Inc. on Form S-3 of our report dated October 29, 1999 appearing in this Annual Report on Form 10-K of Zila, Inc. for the year ended July 31, 1999. DELOITTE & TOUCHE LLP Phoenix, Arizona October 29, 1999