Home › CFR › Title 21 › Part 33621 CFR Part 336 — Antiemetic Drug Products for Over-the-Counter Human UseSubpart A — General Provisions§ 336.1— Scope.§ 336.3— Definition.Subpart B — Active Ingredients§ 336.10— Antiemetic active ingredients.Subpart C — Labeling§ 336.50— Labeling of antiemetic drug products.§ 336.80— Professional labeling.