3.2 Controlled Substance Dispensing, Refills, & Partial Fills

Expiration and Refill Limits for Controlled Substances

In California, the rules surrounding the expiration and refilling of controlled substances are heavily regulated to prevent abuse and diversion.

Schedule II Controlled Substances: According to Health and Safety Code (H&SC) § 11166, a prescription for a Schedule II controlled substance is valid for six months from the date it is written. After this six-month period, the prescription becomes invalid and cannot be dispensed. Furthermore, under H&SC § 11200(c), Schedule II prescriptions are strictly prohibited from being refilled. If a patient needs continued treatment with a Schedule II drug, the prescriber must issue a new, distinct prescription. A prescriber may issue multiple prescriptions on the same day for a Schedule II drug, provided they indicate the earliest date each prescription may be filled (e.g., "Do not fill until [Date]"), and the total days' supply does not exceed a 90-day supply.

Schedule III and IV Controlled Substances: Prescriptions for Schedule III and IV controlled substances are also valid for a maximum of six months from the date of issue. However, unlike Schedule II drugs, Schedule III and IV prescriptions can be refilled. The maximum allowed is up to five refills within that six-month window. Importantly, the total quantity of refills dispensed cannot exceed a 120-day supply of the medication. This 120-day rule applies only to the refills, not the initial fill. For example, if a prescription is written for a 30-day supply with 5 refills, dispensing all 5 refills would result in a 150-day supply from refills alone, which violates the 120-day limit. The pharmacy would only be legally permitted to dispense up to 4 refills (120 days total) before requiring a new prescription.

Schedule V Controlled Substances: Schedule V prescriptions in California are valid for six months from the date of issue. Unlike Schedule III and IV, there is no strict statutory limit of five refills or a 120-day supply for Schedule V drugs under federal law; however, practically, prescribers often limit refills, and prescriptions expire after six months.

Partial Filling of Schedule II Prescriptions

Partial filling of Schedule II controlled substances is allowed under strict conditions, largely defined by the federal Comprehensive Addiction and Recovery Act (CARA) and adopted by California law. There are three primary scenarios for partial fills:

1. The 30-Day Rule (Patient/Prescriber Request): Under CARA, a pharmacist may partially fill a Schedule II prescription if requested by the patient or the prescriber. If partially filled under this rule, the remaining portion of the prescription must be filled within 30 days of the date the prescription was written. If the remaining portion is not filled within 30 days, the remainder is void, and the pharmacist must notify the prescriber.

2. The 72-Hour Rule (Pharmacy OOS): If a pharmacy does not have sufficient stock to fully fill a Schedule II prescription (Out of Stock), the pharmacist may dispense a partial quantity. However, the remaining portion must be dispensed within 72 hours of the first partial filling. If the remaining portion cannot be supplied within this 72-hour window, the pharmacist must notify the prescriber, and no further quantity can be supplied on that prescription. The patient would need a new prescription for any additional medication.

3. The 60-Day Rule (LTCF or Terminally Ill): For patients residing in a Long-Term Care Facility (LTCF) or those with a documented terminal illness, a pharmacist may dispense partial fills of a Schedule II prescription multiple times. For these specific patient populations, the prescription is valid for 60 days from the issue date, and partial fills may occur throughout that 60-day period. The pharmacist must record on the prescription that the patient is "terminally ill" or an "LTCF patient."

Reporting Loss or Theft of Controlled Substances

When a pharmacy discovers a theft or significant loss of controlled substances, immediate action is required to notify both federal and state authorities.

DEA Notification (Federal): The pharmacy must notify the local DEA Diversion Field Office in writing within one business day of the discovery of a theft or significant loss. After this initial notification, the pharmacy must complete and submit DEA Form 106 (Report of Theft or Loss of Controlled Substances). If the investigation takes time, the initial written notice is sufficient for the one-day deadline, but Form 106 must follow promptly once details are confirmed.

Board of Pharmacy Notification (State): Under 16 California Code of Regulations (CCR) § 1715.6, the pharmacy must also report qualifying controlled-substance losses to the California State Board of Pharmacy (threshold aggregate losses, any employee-theft CS loss, or PIC-determined significant loss). If the loss is due to employee theft, the Board must be notified within 14 days of discovery. For any other type of loss (e.g., burglary, lost in transit), the Board must be notified within 30 days of discovery.

It is critical to distinguish between the DEA's "one business day" rule and the Board's "14-day / 30-day" rules. A comprehensive pharmacy manager will maintain a strict protocol to immediately lock down records, perform an emergency inventory, and file the appropriate forms to ensure absolute compliance with both federal and state jurisdictions.

Summary Table of Dispensing Rules