CFR›Title 21›Chapter I›Part 344 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 344—TOPICAL OTIC DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE Subparts A Subpart A—General Provisions Sections 344.1–344.3 B Subpart B—Active Ingredients Sections 344.10–344.12 C Subpart C—Labeling Sections 344.50–344.52 Authority21 U.S.C. 321, 351, 352, 353, 355, 360, 371.Source51 FR 28660, Aug. 8, 1986, unless otherwise noted. Previous 343 Part 343—Internal Analgesic, Antipyretic, and Antirheumatic Drug Products for Over-the-Counter Human Use Next 346 Part 346—Anorectal Drug Products for Over-the-Counter Human Use