### Question
How is the term valid prescription defined?


### Answer
The term **valid prescription** is defined in *21 CFR § 1300.04* as the following:

> a prescription that is issued for a legitimate medical purpose in the usual course of professional practice by:

(i) A practitioner who has conducted at least one in-person medical evaluation of the patient; 

#### Citation:
  - *21 CFR § 1300.04*
  - Heading: **PART 1300—DEFINITIONS**

