### Question
What is the definition of drug?


### Answer
The definition of **drug** is as follows in *21 U.S.C. § 321*:

> (A) articles recognized in the official United States Pharmacopoeia, official Homoeopathic Pharmacopoeia of the United States, or official National Formulary, or any supplement to any of them

#### Citation:
  - *21 U.S.C. § 321*
  - Heading: **CHAPTER 8-NARCOTIC FARMS > SUBCHAPTER II-DEFINITIONS**

