Darvocet, a combination of propoxyphene and acetaminophen, was withdrawn from the U.S. market due to serious safety concerns including heart rhythm abnormalities and overdose risk. Any online source offering Darvocet—especially without a prescription—is operating outside of legal and medical guidelines. Consumers should avoid these offers entirely, as the risks of taking banned or discontinued medications are severe. Safer alternatives should be discussed with a licensed healthcare provider.