### Question
How does the law define approved drug?


### Answer
Under *21 U.S.C. § 353b*, **approved drug** is defined as:

> a drug that is approved under section 355 of this title and does not appear on the list described in subsection (a)(4) of drugs that have been withdrawn or removed from the market because such drugs or components of such drugs have been found to be unsafe or not effective

#### Citation:
  - *21 U.S.C. § 353b*
  - Heading: **CHAPTER 9-FEDERAL FOOD, DRUG, AND COSMETIC ACT > SUBCHAPTER V-DRUGS AND DEVICES > Part A-Drugs and Devices**

