A working guide to pharmacy and prescription law for the lawyer advising a patient, a pharmacist, or a pharmacy. Part one covers what makes a drug prescription-only and the preemption asymmetry that decides whether an injured patient has a claim. Part two covers prescription validity, the pharmacist's independent duty, and refusal. Part three covers controlled substances and corresponding responsibility after the Supreme Court restored a good-faith defense. Part four covers conscience refusals. Part five covers coverage, formularies, and the appeals that succeed. Part six covers pricing, benefit managers, and the state regulation that survived preemption. Part seven covers substitution, compounding, and licensing. Part eight covers dispensing errors, fraud exposure, and access failures.