Propoxyphene napsylate belongs on the narcotic class of medicines which act as mild analgesics and acetaminophen can be a non-narcotic, weak soreness reliever, fever reducer (antipyretic) along with boosts the effects of propoxyphene. Darvocet is discontinued while in the U.S. on account of basic safety problems about coronary heart toxicity. https://caretechpharmacy.com