---
title: "How may Schedule III through V drugs be prescribed? Answer in under 100 words. Cite only eCFR (www.ecfr.gov) sources."
canonical: https://www.m-i-n-d.ai/minds/pharmacy/schedule-iii-v-prescription-rules
jurisdiction: "US Federal"
last_verified: 2026-08-28
license: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
attribution: "Source: MIND (m-i-n-d.ai)"
---

# How may Schedule III through V drugs be prescribed? Answer in under 100 words. Cite only eCFR (www.ecfr.gov) sources.

Under 21 CFR § 1306.21, as published in the eCFR (originally issued March 24, 1997; amended March 31, 2010), a pharmacist may dispense Schedule III–V controlled substances that are prescription drugs under section 503(b) of the Federal Food, Drug, and Cosmetic Act only pursuant to a written, facsimile, electronic, or oral prescription. An oral prescription must be promptly reduced to writing by the pharmacist with all § 1306.05 information except the signature.

## Details / How it works

Per **21 CFR § 1306.21(a)**, a pharmacist may dispense a Schedule III, IV, or V controlled substance that is a prescription drug (as determined under section 503(b) of the Federal Food, Drug, and Cosmetic Act, 21 U.S.C. § 353(b)) only pursuant to one of four methods:

1. A **paper prescription** signed by the practitioner;
2. A **facsimile (fax)** copy of a signed paper prescription transmitted by the practitioner or the practitioner's agent to the pharmacy;
3. An **electronic prescription** that meets the requirements of 21 CFR part 1306 and 21 CFR part 1311; or
4. An **oral (telephone) prescription** made by an individual practitioner and promptly reduced to writing by the pharmacist, containing all information required in § 1306.05 except for the practitioner's signature.

Under **§ 1306.21(b)**, an individual practitioner may administer or dispense Schedule III–V substances directly in the course of professional practice without a prescription, subject to § 1306.07. Under **§ 1306.21(c)**, an institutional practitioner may administer or dispense (but not prescribe) such substances pursuant to a written prescription, fax, electronic prescription, oral prescription reduced to writing, or a medication order for immediate administration, subject to § 1306.07.

## Exceptions & edge cases

- **Purpose of issue (21 CFR § 1306.04):** A prescription for a Schedule III, IV, or V controlled substance must be issued for a legitimate medical purpose by an individual practitioner acting in the usual course of professional practice. A corresponding responsibility rests with the dispensing pharmacist. Prescriptions issued outside the usual course of treatment are not valid, and violators are subject to penalties under 21 U.S.C. §§ 841, 843.
- **Opioid use disorder treatment (§ 1306.04(c)–(d)):** A practitioner may issue a Schedule III, IV, or V prescription for use in detoxification or maintenance treatment, provided the prescription complies with all applicable federal and state laws and the requirements of section 309A of the CSA (21 U.S.C. § 829a) and § 1306.07(f). Such prescriptions may not be used to supply a practitioner with stock for general dispensing to patients.
- **Institutional practitioners:** Authorized to administer or dispense, but **not** to prescribe, Schedule III–V controlled substances.

## Sources

- [1] U.S. Government Publishing Office / Drug Enforcement Administration — 21 CFR 1306.21 — Requirements for Schedule III-V controlled substance prescriptions · https://www.ecfr.gov/current/title-21/section-1306.21 · as of 2026-08-28
- [2] U.S. Government Publishing Office / Drug Enforcement Administration — 21 CFR 1306.04 — Purpose of a controlled substance prescription — corresponding responsibility · https://www.ecfr.gov/current/title-21/section-1306.04 · as of 2026-08-28