### Question
How does the law define controlled substance analogue?


### Answer
Under *21 U.S.C. § 802*, **controlled substance analogue** is defined as:

> a substance—


(i) the chemical structure of which is substantially similar to the chemical structure of a controlled substance in schedule I or II

#### Citation:
  - *21 U.S.C. § 802*
  - Heading: **CHAPTER 12-MEAT INSPECTION > SUBCHAPTER I-CONTROL AND ENFORCEMENT > Part A-Introductory Provisions**

