1 Exhibit 23 INDEPENDENT AUDITOR'S CONSENT We consent to the incorporation by reference in Registration Statement Nos. 33-32805, 33-32970, and 333-42769 of Zila, Inc. on Form S-8 and in Registration Statement Nos. 33-46239, 333-06019, 333-00645 and 333-31651 of Zila, Inc. on Form S-3 of our report dated August 23, 1997 relating to the consolidated financial statements of Oxycal Laboratories, Inc., appearing in this Form 8-K/A of Zila, Inc. /s/ Deloitte & Touche LLP DELOITTE & TOUCHE LLP Phoenix, Arizona January 14, 1998