"darvon was only one of two medicines, which didn&#039;t really help. sedating but no real pain relief, sort of a distraction from pain. i was being treated for prophylaxis of tuberculosis with isoniazid (inh), so my options on pain medicines were a bit limited to &quot;nothing with acetaminophen&quot; -which mostly left the strong painkillers - finally md found some vicoprofen, which worked well but not &quot;too well&quot;."