Noun | 1. | narcotic antagonist - an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration) antagonist - a drug that neutralizes or counteracts the effects of another drug Nalline, nalorphine - a narcotic antagonist (trade name Nalline) that counteracts the effects of narcotics (especially the effects of poisoning by morphine) naloxone, Narcan - a potent narcotic antagonist (trade name Narcan) especially effective with morphine naltrexone - an oral antagonist against the action of opiates |