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 December 19, 1997 relating to the Statements of North American Direct Revenues and Direct Expenses of The Peridex Brand of The Procter & Gamble Company, appearing in this Form 8-K/A of Zila, Inc. /s/ Deloitte & Touche LLP - ---------------------------------------- DELOITTE & TOUCHE LLP Cincinnati, Ohio January 14, 1998