Prescription Requirements, Dispensing, Labeling, and Transfers
What makes a prescription valid
A prescription is a legal order that must be legible, complete, and issued for a legitimate medical purpose by a prescriber acting in the usual course of practice. Core elements: patient name and address, date, drug name, strength, dosage form, quantity, directions, refills authorized, prescriber name, address, and signature (manual or electronic), plus the prescriber's DEA number when a controlled substance is involved. Oral, faxed, and electronic prescriptions are permitted within limits; electronic controlled substance prescriptions require a DEA-compliant EPCS system. The pharmacist resolves ambiguity - unclear directions, missing quantity, implausible dose - before dispensing and refuses orders showing error or misuse. Labeling includes pharmacy name and address, prescription number, date, patient name, directions, prescriber, quantity, required cautions, and expiration or beyond-use dating. Transfers of prescription information between pharmacies are permitted for remaining refills under defined conditions; controlled substance transfers are narrower, with federal rules allowing a one-time transfer of an unfilled electronic or paper Schedule II–V prescription between retail pharmacies for initial filling, and limited, documented refill transfers for Schedule III–V. Generic substitution is permitted unless the prescriber indicates otherwise, and the patient is informed.
Traps
Treating a prescriber's DEA number as sufficient without a state license; assuming a faxed Schedule II is always invalid (long-term care, hospice, and compounding exceptions exist); assuming refills transfer indefinitely; failing to verify and document a prescription alteration with the prescriber; forgetting the substitution communication requirement.
Rule of thumb
Read every prescription as a checklist: who, what, how much, how often, how many refills, who signed, when. If any box is blank or contradictory, call the prescriber and document - never infer.