The Nature of the Drug: Darvon and Darvocet were pain relievers that treated mild to moderate pain, and that were often used by arthritis sufferers. Darvocet was developed by Eli Lilly and Co. and marketed by Xanodyne Pharmaceuticals, and it contained propoxyphene and acetaminophen. Darvon was also developed by Lilly and marketed by Xanodyne, and it contained propoxyphene.
