US lawFederal (United States)RegulationsTitle 21 CFR — Food and DrugsChapter I — FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICESPart 336 — ANTIEMETIC DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USESubpart A — General Provisions336.321 C.F.R. § 336.3Definition.Last amended: 2016Year: 2026Length: 15 wordsOfficial source Cite as 21 C.F.R. § 336.3 (2026)As used in this part: Antiemetic. An agent that prevents or treats nausea and vomiting.Previous21 C.F.R. § 336.1