propoxyphene propoxyphene /proʊˈpɑːksɪfiːn/

noun

1. A mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive  ( Darvon , propoxyphene , propoxyphene hydrochloride )
   a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive