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What is a pharmacist's responsibility when filling a controlled substance prescription? Answer in under 100 words. Cite only eCFR (www.ecfr.gov) sources.

Under 21 CFR 1306.04, a pharmacist filling a controlled substance prescription shares corresponding responsibility with the prescribing practitioner to ensure the prescription was issued for a legitimate medical purpose by an individual practitioner acting in the usual course of professional practice. The pharmacist must know the practitioner and confirm the prescription's legitimacy; knowingly filling an illegitimate prescription subjects both parties to criminal penalties under 21 U.S.C. 841, 843.
Last verified: 2026-08-28 · Sources checked: 2/2 resolving · Next scheduled review: 2026-11-26

Details / How it works

Corresponding responsibility of the pharmacist

Per 21 CFR 1306.04(a), the responsibility for proper prescribing and dispensing of controlled substances rests on the prescribing practitioner, but a corresponding responsibility rests with the pharmacist who fills the prescription.

To be valid, a controlled substance prescription must be:

  • Issued for a legitimate medical purpose by an individual practitioner (physician, dentist, veterinarian, or other licensed provider);
  • Issued in the usual course of the practitioner's professional practice or in legitimate, authorized research.

An order purporting to be a prescription that does not meet these criteria is not a valid prescription under section 309 of the Controlled Substances Act (21 U.S.C. 829).

Consequences of filling an illegitimate prescription

A pharmacist who knowingly fills such a purported prescription — and the person who issued it — is subject to the criminal penalties provided for controlled-substance violations, including those under 21 U.S.C. 841 and 21 U.S.C. 843.

Numbers & thresholds

Threshold / requirement Value
Maximum amount dispensed in an emergency oral authorization (Schedule II) Amount adequate to treat the patient during the emergency period
Deadline for prescriber to deliver follow-up written prescription after emergency oral order Within 7 days
Manner of delivery of follow-up written prescription In person, or by mail postmarked within the 7-day period
Required annotation on follow-up paper prescription "Authorization for Emergency Dispensing" and the date of the oral order
Record-keeping rule for original/facsimile Schedule II prescriptions 21 CFR 1304.04(h)

Exceptions & edge cases

Emergency oral authorizations (Schedule II) — 21 CFR 1306.11(d)

In a defined emergency situation under 21 CFR 290.10, a pharmacist may dispense a Schedule II controlled substance on an oral order from an individual practitioner, provided the pharmacist:

  1. Limits the quantity to the amount adequate to treat the patient during the emergency;
  2. Immediately reduces the prescription to writing, including all information required by 21 CFR 1306.05 except the prescriber's signature;
  3. Makes a reasonable effort to determine that the oral authorization came from a registered individual practitioner (e.g., a callback to the telephone-directory number);
  4. Notifies the nearest office of the DEA (the Administration) if the prescribing individual practitioner fails to deliver the required written prescription — failure to notify voids the authority to dispense without a written prescription.

Central fill pharmacies are not authorized under this paragraph to prepare Schedule II prescriptions on an oral authorization from a retail pharmacist or individual practitioner.

Sources

  1. [1]U.S. Government Publishing Office / Drug Enforcement Administration — 21 CFR 1306.04 — Purpose of a controlled substance prescription — corresponding responsibility · as of 2026-08-28
  2. [2]U.S. Government Publishing Office / Drug Enforcement Administration — 21 CFR 1306.11 — Requirements for Schedule II controlled substance prescriptions · as of 2026-08-28

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