### Question
How does FEDERAL FOOD, DRUG, AND COSMETIC ACT define official compendium?


### Answer
Under *21 U.S.C. § 321*, **official compendium** is defined as:

> the official United States Pharmacopoeia, official Homoeopathic Pharmacopoeia of the United States, official National Formulary, or any supplement to any of them

#### Citation:
  - *21 U.S.C. § 321*
  - Heading: **CHAPTER 9-FEDERAL FOOD, DRUG, AND COSMETIC ACT > SUBCHAPTER II-DEFINITIONS**

