Off-label promotion—pharmaceutical manufacturers’ marketing of FDA-approved drugs for unapproved uses—is considered a First Amendment right by some, a threat to the safety and effectiveness of pharmaceutical drugs by others. Although off-label prescription is legal and often beneficial, the Federal Food, Drug, and Cosmetic Act (FDCA) and corresponding FDA regulations effectively prohibit off-label promotion. The FDA can look to statements by pharmaceutical representatives as evidence of a drug’s intended use, thereby placing manufacturers that promote off-label in a Catch-22: the drug will be subject to the FDCA’s misbranding provisions if manufacturers add labeling instructions for that intended use, but also if they fail to add those instructions. To legally promote a new intended use, pharmaceutical companies must satisfy the FDA’s rigorous approval process. In United States v. Caronia, the Second Circuit Court of Appeals ruled that the FDCA could not be interpreted to prohibit truthful, off-label promotion.