CFR › Title 21 › Part 344Part 344 — Topical Otic Drug Products for Over-the-Counter Human UseSubpart A — General Provisions§ 344.1— Scope.§ 344.3— Definitions.Subpart B — Active Ingredients§ 344.10— Earwax removal aid active ingredient.§ 344.12— Ear drying aid active ingredient.Subpart C — Labeling§ 344.50— Labeling of earwax removal aid drug products.§ 344.52— Labeling of ear drying aid drug products.