[Code of Federal Regulations] [Title 21, Volume 5] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR336.3] [Page 232] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 336_ANTIEMETIC DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE--Table of Subpart A_General Provisions Sec. 336.3 Definition. As used in this part: Antiemetic. An agent that prevents or treats nausea and vomiting.