Before using propoxyphene, tell your doctor if you are allergic to any drugs, or if you have: asthma, COPD, sleep apnea, or other breathing liver or kidney history of head injury or brain mental or history of drug or alcohol addiction. Forum mailing list For webmasters TheFreeDictionary Google Live Search Word Article Starts with Ends with Text New: Language forums Dictionary Darvon redirected from propoxyphene Also found in: Dictionary thesaurus, Medical, Wikipedia. Call your doctor at once if you have any of these serious side effects: shallow breathing, slow feeling light-headed, confusion, hallucinations, unusual thoughts or seizure convulsions or jaundice yellowing of the skin or eyes. Do not use alcohol, other prescription or OTC sedatives, tranquilizers, propoxyphene orden en linea antihistamines, or pain medications without consulting prescriber.