7.5 Returning, Reusing & Disposing of Dispensed Drugs
Key Takeaways
- A drug that has left the control of the pharmacy cannot be returned to stock and redispensed, because the pharmacy can no longer attest to its storage, handling or integrity.
- Controlled substances may not be discarded in the trash or flushed down a drain; expired or unwanted pharmacy stock goes to a DEA-registered reverse distributor.
- A pharmacy may voluntarily modify its DEA registration to become an authorised collector and operate a collection receptacle, and pharmacy staff may never handle or inspect what a patient deposits.
- Two employees must witness the installation, removal and sealing of a collection receptacle inner liner, and the liner is destroyed by a method rendering the contents non-retrievable.
- Uncollected prescriptions that never left the pharmacy's control may be returned to stock, but the DSCSA and product-integrity questions must still be answered before the product is redispensed.
Returning, Reusing & Disposing of Dispensed Drugs
The NABP blueprint lists returning or reusing drugs as a competency in its own right, and it is a topic where the safe general rule and the narrow exceptions both matter.
The General Rule: Once It Leaves, It Cannot Come Back
A prescription medication that has been delivered to a patient and has left the pharmacy's control cannot be returned to stock and redispensed to another patient. The reasoning is a chain-of-custody argument rather than a squeamishness argument:
- the pharmacy can no longer attest to storage conditions — temperature, humidity, light exposure;
- it cannot attest to handling — whether the container was opened, contaminated or tampered with;
- it cannot attest to identity — whether what is in the vial is what the label says; and
- under the FDCA, dispensing a product whose strength, quality or purity cannot be assured is adulteration, and dispensing it under a label that no longer describes it is misbranding.
The same reasoning applies to partially used products and to anything a patient has taken home, however briefly, and regardless of whether the container appears unopened.
The narrow exception: never left the pharmacy
A prescription that was filled, labelled and never collected has not left the pharmacy's control. Such a product may be returned to stock, provided:
- the product's identity, lot and expiry are confirmed;
- it was stored throughout under labelled conditions; and
- the pharmacy's own return-to-stock policy is followed and documented.
[!WARNING] Automated counting equipment complicates return to stock. Where a pharmacy uses cell-based counting devices, a product returned to a cell commingles lots. If lot integrity cannot be preserved, the pharmacy must be able to quarantine every commingled lot in the event of a recall — which is the practical reason many pharmacies decline to return counted product to automated cells at all.
Disposal of Pharmacy Stock: Reverse Distributors
Expired, damaged, recalled or otherwise unwanted controlled substance stock is disposed of through a DEA-registered reverse distributor. A pharmacy may not flush controlled substances or place them in ordinary waste.
| Schedule being transferred | Documentation |
|---|---|
| Schedules I and II | The reverse distributor issues a DEA Form 222 (or the CSOS electronic equivalent) to the pharmacy; the pharmacy is the supplier and the reverse distributor the purchaser |
| Schedules III, IV and V | An itemised invoice or record showing drug name, dosage form, strength, quantity and date of transfer |
[!IMPORTANT] DEA Form 41 is not the pharmacy's form here. Form 41, the Registrant Record of Controlled Substances Destroyed, is completed by the registrant that actually destroys the substances. When a pharmacy sends stock to a reverse distributor, the reverse distributor destroys and files Form 41. A pharmacy completes Form 41 only when it destroys on site under an authorised method.
Expired or quarantined controlled substances awaiting destruction must be segregated and secured pending transfer, and Massachusetts perpetual inventory expectations extend to controlled substances that are expired, quarantined or pending reverse distribution.
Patient Take-Back: Collection Receptacles
The Secure and Responsible Drug Disposal Act of 2010 and the DEA's disposal regulations allow an ultimate user — a patient or a member of the household — to surrender unwanted controlled substances.
- A retail pharmacy may voluntarily modify its DEA registration to become an authorised collector. It is not compulsory.
- A collection receptacle must be securely fastened to a permanent structure, locked or otherwise made inaccessible, and located in the immediate proximity of a designated area where controlled substances are stored and at which an employee is present.
- The receptacle uses a removable, tamper-evident inner liner that is waterproof and tear-resistant, with an opening that permits deposit but not retrieval.
The two-employee rule
Installation, removal, sealing, transfer, storage and transport of an inner liner must be performed in the presence of at least two employees, and each event is recorded.
The no-handling rule
Pharmacy personnel may not handle, inspect, count or sort what a patient deposits. The patient deposits the material personally. Once sealed, a liner may not be opened, x-rayed, analysed or otherwise penetrated, and it is destroyed by a method that renders the contents non-retrievable.
[!CAUTION] A collection receptacle is not an inventory line. Because staff never see what goes in, the contents are never recorded on the pharmacy's controlled substance inventory. That is by design, and it is why the two-employee and non-retrievable-destruction controls exist instead.
Massachusetts Drug Donation
Massachusetts has authorised limited drug donation and redistribution programmes for unused medication from institutional settings. Because eligibility, the drug classes covered and the participating facilities are set by programme rules rather than by the Board's practice regulations, verify the current programme requirements before accepting or redistributing donated product, and do not assume that donation authority extends to community pharmacy return-to-stock.
Worked Traps
- A patient returns an unopened, sealed bottle of atorvastatin collected yesterday, asking for a refund and redispensing. Refuse redispensing. The product left the pharmacy's control; storage cannot be attested.
- A pharmacy technician tips a patient's take-back deposit onto a tray to count the tablets for the log. Serious violation — staff may not handle or inspect deposited material.
- A pharmacy completes DEA Form 41 for expired oxycodone sent to a reverse distributor. Wrong form-holder. The reverse distributor files Form 41 after destruction; the pharmacy documents the transfer on a DEA Form 222 issued by the reverse distributor.
- One employee removes and seals an inner liner at closing time. Violation — two employees must be present for the removal and sealing.
A patient returns an unopened bottle of a Schedule VI medication that was collected the previous day and asks the pharmacy to return it to stock. What should the pharmacist do?
Who completes DEA Form 41 when a pharmacy sends expired Schedule II stock to a DEA-registered reverse distributor?
Which requirement applies to the inner liner of a controlled substance collection receptacle at a pharmacy that is an authorised collector?