What does Section 503 of the Federal Food, Drug, and Cosmetic Act prohibit?

Section 503 of the Federal Food, Drug, and Cosmetic Act specifically addresses the distribution and handling of prescription drug samples. It prohibits the trade or sale of these samples to ensure that they are used appropriately by healthcare providers for the purpose of evaluating and prescribing medications based on patient needs. This regulation is designed to prevent misuse or abuse of prescription drug samples, which could lead to negative outcomes for patients and the healthcare system as a whole.

The other options involve activities that, while regulated, do not specifically fall under the prohibition established by Section 503. Manufacturing prescription drugs, promotion of drug products, and distribution of non-prescription products are governed by different sections of the Act or related regulations, but Section 503's focus on the handling of prescription drug samples is distinct and aims to protect both patient safety and the integrity of the healthcare system.