Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to nalorphine: naloxone


(Pharmacology) an anti-narcotic drug used esp to counteract the effects of morphine poisoning


(ˈnæl ərˌfin, nælˈɔr fin)

a narcotic antagonist, C19H21NO3, chemically related to morphine, used to counteract overdose and to diagnose addiction.
[1950–55; N-al(lyln)or(mor)phine]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nalorphine - a narcotic antagonist (trade name Nalline) that counteracts the effects of narcotics (especially the effects of poisoning by morphine)
narcotic antagonist - an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration)
References in periodicals archive ?
Lico, "Peripheral modulation of pain in conscious guinea pigs: effect of morphine, nalorphine and clonidine," Brazilian Journal of Medical and Biological Research, vol.
Naltrexone is a cyclopropyl derivative of oxymorphone, structurally similar to naloxone and nalorphine. Taken orally, it is rapidly and almost completely (95%) absorbed.
The hospital stay was 1 day for all patients, during which nonsteroidal anti-inflammatory drugs were used at fixed times, with added narcotics (nalorphine) as needed.