Controlled Substances and Drug Distribution Requirements
Scheduling and handling
Know the five schedules and their criteria: abuse potential, accepted medical use, and dependence liability. Schedule I has no accepted medical use; Schedule II has high abuse potential with severe dependence liability; Schedule III through V descend in risk. Know that Schedule II prescriptions require a manually signed or properly electronically transmitted prescription, no refills, and quantity limits; multiple prescriptions totaling up to a 90-day supply may be issued with conditions. Partial filling of Schedule II is limited, with an emergency exception allowing the balance within 72 hours.
Concepts candidates must know
Know that Schedule III to V prescriptions may be refilled up to five times within six months of issue, and that these prescriptions may be transferred once between pharmacies for refill purposes. Know the record requirements: biennial inventory with exact counts for Schedule II, invoices and dispensing records retained under the CSA's two-year minimum and any longer state period, DEA Form 222 or CSOS for Schedule II ordering, DEA Form 41 for destruction, and DEA Form 106 for theft or significant loss. Understand corresponding responsibility: the pharmacist must resolve red flags before dispensing. In Oklahoma, OBNDD registration and state PMP query requirements apply in addition to federal rules.
Traps
Do not confuse the 72-hour emergency partial fill with the general partial fill allowance for Schedule II patients in long-term care or terminally ill settings. Do not transfer a Schedule II prescription. Do not assume a refill may exceed six months because the prescriber authorized five. Watch for questions about a prescriber writing a Schedule II prescription on a photocopied blank, or about a pharmacy filling a controlled substance prescription from another state, which raises validity questions.
Rule of thumb
For any controlled substance scenario, run four checks: is the prescription valid, is the patient legitimate, is the prescriber legitimate, and are the records complete? If any answer is uncertain, document the resolution before dispensing.