The U.S. Food and Drug Administration pulled propoxyphene from the market in 2010, citing evidence that the drug can cause heart damage, even when used as prescribed, according to ABC News. In some incidences, the FDA linked the drug to deadly cardiac abnormalities.
Xanodyne Pharmaceuticals in Newport, Kentucky, manufactured propoxyphene marketed as Darvon and Darvocet and agreed to the withdrawal of the drugs from the market, notes ABC News. The FDA also asked manufacturers of the generic versions of the drug to remove those products from the market as well. The FDA’s action was based on a clinical study demonstrating that the drug caused potentially fatal heart arrhythmias by altering the heart’s electrical activity.