21 USC 829 Prescriptions: Rules, Refills, and Penalties

The prescription requirements in 21 USC 829 sort controlled substances into tiers and attach different rules to each: Schedule II drugs need a written prescription and cannot be refilled, Schedules III and IV allow up to five refills within six months, and Schedule V faces the fewest federal restrictions.¹ Around that core, federal regulations layer rules on who may prescribe, how pharmacists must dispense, when partial fills and transfers are allowed, and what records must be kept. Violations can trigger civil fines, criminal prosecution, and loss of DEA registration.

Prescription and Refill Rules by Schedule

Schedule II substances carry the tightest controls. A pharmacist cannot dispense a Schedule II drug without a written prescription from a registered practitioner, and no refills are permitted.¹ Every additional supply requires a new prescription. To reduce office visits for patients with stable, ongoing needs, practitioners may issue multiple Schedule II prescriptions on the same date, each covering up to a 30-day supply, for a combined total of up to 90 days. Each prescription after the first must include a “do not fill before” date so the fills stagger properly.²

Schedule III and IV drugs allow more flexibility. A pharmacist can dispense them based on a written, electronic, or oral prescription, and the prescription may be refilled up to five times within six months of the issue date. Whichever limit hits first ends the prescription, and the prescriber must write a new one to continue therapy.³ Refills authorized orally still count against the same five-refill, six-month ceiling. Each refill must be documented on the back of the original paper prescription or in the pharmacy’s electronic record.

Schedule V substances face the fewest federal restrictions. The statute requires only that they be distributed for a medical purpose, and neither 21 USC 829 nor 21 CFR 1306.22 sets a specific refill cap.³ Refill frequency is left to the prescriber’s judgment. States often impose their own limits, particularly for Schedule V products with known misuse potential.

Who Can Prescribe

Only practitioners who are authorized by state law and separately registered with the DEA can prescribe controlled substances. Registration runs through 21 CFR 1301.13, which assigns each registrant a unique DEA number and sets a 36-month renewal cycle.⁴ The DEA number must appear on every controlled substance prescription.

Nurse practitioners, physician assistants, and other mid-level practitioners may prescribe only where their state authorizes it and they hold their own DEA registration. State scope varies significantly. Some states let these practitioners prescribe Schedule II drugs independently; others require a collaborative agreement with a physician or cap the supply that can be prescribed for specific conditions such as acute pain.

Emergency Oral Prescriptions for Schedule II

The written-prescription rule for Schedule II drugs has a narrow emergency exception. When a patient needs a Schedule II drug immediately and a written prescription is not feasible, a pharmacist may dispense based on the prescriber’s oral authorization. The quantity must be limited to what the patient needs during the emergency period, the pharmacist must immediately reduce the oral order to writing, and the pharmacist must make a reasonable effort to verify the prescriber’s identity if the prescriber is not already known.⁵

The prescriber then has seven days to deliver a signed written prescription to the pharmacy. That prescription must be marked “Authorization for Emergency Dispensing” along with the date of the oral order, and if delivered by mail, it must be postmarked within the seven-day window. A pharmacist who never receives the follow-up prescription must notify the nearest DEA field office.⁵

The Pharmacist’s Corresponding Responsibility

Every controlled substance prescription must be issued for a legitimate medical purpose by a practitioner acting in the usual course of professional practice. Federal regulations put a matching “corresponding responsibility” on the pharmacist who fills it. A pharmacist who knowingly fills a prescription that was not issued for a legitimate medical purpose faces the same legal exposure as the prescriber who wrote it.⁶

In practice, pharmacists are expected to watch for warning signs of diversion or misuse. These include unusual prescribing patterns, patients traveling long distances to fill prescriptions, drug combinations commonly associated with abuse, and cash payments when a patient has insurance. One of these indicators does not automatically bar dispensing, but the pharmacist should investigate and document how the concern was resolved before filling.

When dispensing a Schedule II drug, the pharmacist must label the package with the date of filling, the pharmacy’s name and address, the prescription serial number, the patient’s name, the prescriber’s name, and any directions for use or cautionary statements required by law.⁷ Opioid analgesics and benzodiazepines must also be dispensed with FDA-required Medication Guides containing safety information on risks such as respiratory depression and dependence.

Electronic Prescribing

Electronic prescriptions for controlled substances must comply with the security requirements in 21 CFR Part 1311. Before signing electronically, the prescriber must authenticate using two-factor verification, which combines at least two of the following: something only the prescriber knows (such as a password), something the prescriber is (such as a fingerprint), or something the prescriber has (such as a hardware token separate from the computer).⁸ A growing number of states now mandate electronic prescribing for controlled substances, with penalties handled at the state level.

Partial Fills

The Comprehensive Addiction and Recovery Act of 2016 added subsection (f) to 21 USC 829, allowing pharmacists to partially fill Schedule II prescriptions. Before CARA, a partial fill was only possible when the pharmacy did not have enough stock on hand. Now, a partial fill can be requested by either the patient or the prescriber, provided state law does not prohibit it and the total quantity dispensed across all partial fills does not exceed what was originally prescribed.¹

Timing matters. For a standard written Schedule II prescription, remaining portions must be filled within 30 days of the date the prescription was written. For an emergency oral prescription, the window shrinks to 72 hours. Miss those deadlines and the prescription is void; the prescriber must issue a new one.⁹

Partial filling of Schedule III, IV, and V drugs works more simply. Each partial fill is recorded the same way as a refill, the total dispensed cannot exceed the total prescribed, and no dispensing can occur more than six months after the prescription was issued.¹⁰

Telehealth and Internet Prescribing

Section 829(e), added by the Ryan Haight Online Pharmacy Consumer Protection Act of 2008, prohibits dispensing a controlled substance over the internet without a “valid prescription.” A valid prescription generally requires at least one in-person medical evaluation by the prescribing practitioner or a covering practitioner.¹ The Ryan Haight Act carved out several exceptions for telemedicine encounters, including cases where the patient is physically present at a DEA-registered hospital or clinic, during declared public health emergencies, and for practitioners who obtain a special DEA telemedicine registration.

The COVID-19 pandemic reshaped how these rules operate in practice. DEA and HHS have repeatedly extended temporary flexibilities that allow DEA-registered practitioners to prescribe Schedule II through V controlled substances via telemedicine without a prior in-person evaluation. The fourth temporary extension, effective January 1, 2026, keeps these flexibilities in place through December 31, 2026.¹¹ Anyone relying on those flexibilities should track whether DEA finalizes a permanent telemedicine registration framework or lets the temporary rules expire.

Transferring Prescriptions Between Pharmacies

A patient can move a Schedule III, IV, or V prescription to a different pharmacy, but federal law allows the transfer of original prescription information for refill purposes only once. Two licensed pharmacists must communicate the transfer directly. The pharmacist at the original pharmacy writes “VOID” on the invalidated prescription and records the receiving pharmacy’s name, address, and DEA number. The receiving pharmacist writes “transfer” on the new record and documents the original prescription’s details, including its issue date and remaining authorized refills.¹²

One exception to the one-time limit: pharmacies that share a real-time electronic database may transfer prescriptions multiple times, up to the maximum number of refills the prescriber authorized. Schedule II prescriptions cannot be transferred between pharmacies at all because they cannot be refilled. State law may add restrictions.

Records, Inventory, and Loss Reporting

Pharmacies and practitioners who handle controlled substances must maintain complete and accurate records of every acquisition, prescription, and dispensation for at least two years, and those records must be readily available for DEA inspection.¹³

Every registrant must take an initial inventory of all controlled substances on obtaining DEA registration, then conduct a new inventory at least every two years. The biennial inventory can fall on any date within two years of the previous one and must list each substance by name, dosage form, strength, and quantity.¹⁴ Schedule II records must be kept separate from Schedule III through V records.

When a registrant discovers that controlled substances have been stolen or a significant loss has occurred, written notification must reach the nearest DEA field division office within one business day. The registrant must also complete and submit DEA Form 106, which can be filed through the DEA’s online Theft/Loss Reporting system.¹⁵ Delayed reporting can itself trigger enforcement action.

Penalties for Violations

DEA enforces compliance through audits, inspections, and investigations. Violations split into civil and criminal tracks.

Civil Fines

Recordkeeping failures, improper dispensing, and prescription-related infractions can result in civil fines under 21 USC 842. The base statutory amounts are periodically adjusted for inflation. As of 2025, the inflation-adjusted maximum for recordkeeping violations is $19,246 per violation, and other violations of the section can carry fines of up to $82,950 per violation.¹⁶¹⁷ Those amounts are adjusted annually, so figures for penalties assessed in late 2026 may be slightly higher.

Criminal Charges

Prescribing or dispensing controlled substances outside the scope of legitimate medical practice is a federal crime. Under 21 USC 841, a practitioner who distributes a Schedule I or II substance without a legitimate medical purpose faces up to 20 years in prison. If a patient dies or suffers serious bodily injury as a result, the minimum sentence jumps to 20 years and the maximum extends to life.¹⁸ Separately, 21 USC 843 targets offenses like using fraudulent registration numbers or maintaining premises for illegal distribution, with penalties of up to four years for a first offense and up to eight years for repeat offenders.¹⁹

Beyond prison time and fines, practitioners convicted of controlled substance violations typically lose their DEA registration, and state medical or pharmacy boards can independently suspend or revoke professional licenses. Pharmacists carry criminal exposure as well; anyone who knowingly fills a prescription not issued for a legitimate medical purpose is treated the same as the person who wrote it under the corresponding responsibility doctrine.⁶

1
Office of the Law Revision Counsel. 21 USC 829 – Prescriptions
2
eCFR. 21 CFR 1306.12 – Refilling Prescriptions; Issuance of Multiple Prescriptions
3
eCFR. 21 CFR 1306.22 – Refilling of Prescriptions
4
eCFR. 21 CFR Part 1301 – Registration
5
eCFR. 21 CFR 1306.11 – Requirement of Prescription
6
eCFR. 21 CFR 1306.04 – Purpose of Issue of Prescription
7
eCFR. 21 CFR 1306.14 – Labeling of Substances and Filling of Prescriptions
8
eCFR. 21 CFR Part 1311 – Requirements for Electronic Orders and Prescriptions
9
eCFR. 21 CFR 1306.13 – Partial Filling of Prescriptions
10
eCFR. 21 CFR 1306.23 – Partial Filling of Prescriptions
11
Federal Register. Fourth Temporary Extension of COVID-19 Telemedicine Flexibilities for Prescription of Controlled Substances
12
eCFR. 21 CFR 1306.25 – Transfer Between Pharmacies of Prescription Information for Schedules III, IV, and V Controlled Substances for Refill Purposes
13
eCFR. 21 CFR 1304.04 – Maintenance of Records and Inventories
14
eCFR. 21 CFR 1304.11 – Inventory Requirements
15
Diversion Control Division. Drug Disposal Information
16
Office of the Law Revision Counsel. 21 USC 842 – Prohibited Acts B
17
Federal Register. Civil Monetary Penalties Inflation Adjustments for 2025
18
Office of the Law Revision Counsel. 21 USC 841 – Prohibited Acts A
19
Office of the Law Revision Counsel. 21 USC 843 – Prohibited Acts C