Legend Drug

The term “legend drug” originates from a specific warning statement, known as the “legend,” that was legally required on the manufacturer’s packaging. This original statement read: “Caution: Federal law prohibits dispensing without prescription.” This requirement formally established a class of drugs that could not be sold directly to the public. This foundational regulatory structure was created by the Durham-Humphrey Amendment of 1951, which amended the Federal Food, Drug, and Cosmetic Act. The amendment defined prescription drugs as those deemed unsafe for self-medication, thereby necessitating the supervision of a healthcare practitioner. Medication is classified as a legend drug if it presents a potential for toxicity, requires complex monitoring, or if the method of administration demands professional instruction.