### Question
What does authorized purchaser mean?


### Answer
**Authorized purchaser** has the following meaning in *21 U.S.C. § 841*:

> any of the following persons, provided such person has acquired the controlled substance in accordance with this chapter:


(i) A person with a valid prescription that is issued for a legitimate medical purpose in the usual course of professional practice that is based upon a qualifying medical relationship by a practitioner registered by the Attorney General

#### Citation:
  - *21 U.S.C. § 841*
  - Heading: **CHAPTER 13-DRUG ABUSE PREVENTION AND CONTROL > SUBCHAPTER I-CONTROL AND ENFORCEMENT > Part D-Offenses and Penalties**

