Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A drug, C19H21NO3, derived from morphine, used to treat respiratory depression and other effects of an overdose of narcotics.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A drug used to reverse opioid overdose.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a narcotic antagonist (trade name Nalline) that counteracts the effects of narcotics (especially the effects of poisoning by morphine)

Etymologies

Short for N-allylnormorphine, its chemical name.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Contraction of N-allyl-normorphine. (Wiktionary)

Examples

  • He then repeated the experiment, but added the opiate antagonists nalorphine and naloxone.

    Alcohol and The Addictive Brain

  • … if the concept of Davis and Walsh was tenable, the morphine antagonists nalorphine, naloxone, and so forth would antagonize short-term alcohol intoxication as they do specifically for morphine-like drugs.12

    Alcohol and The Addictive Brain

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