[Code of Federal Regulations] [Title 21, Volume 5] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR333.210] [Page 228] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES--Continued PART 333--TOPICAL ANTIMICROBIAL DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE--Table of Contents Subpart C--Topical Antifungal Drug Products Sec. 333.210 Antifungal active ingredients. The active ingredient of the product consists of any one of the following within the specified concentration established for each ingredient: (a) Clioquinol 3 percent. (b) Haloprogin 1 percent. (c) Miconazole nitrate 2 percent. (d) Povidone-iodine 10 percent. (e) Tolnaftate 1 percent. (f) Undecylenic acid, calcium undecylenate, copper undecylenate, and zinc undecylenate may be used individually or in any ratio that provides a total undecylenate concentration of 10 to 25 percent.