Naloxone

//nəˈlɒk.səʊn// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An opioid inverse agonist used to counter the effects of an overdose on opioids (such as heroin or morphine). uncountable

    "Neffy uses the same spray device as Narcan, the naloxone nasal spray for opioid overdose, according to a spokesperson for its maker, ARS Pharmaceuticals."

  2. 2
    a potent narcotic antagonist (trade name Narcan) especially effective with morphine wordnet

Synonyms

All synonyms
narcannarcan

Example

More examples

"Naloxone is a life-saving drug that can reverse the effects of an opioid overdose."

Etymology

From nal- (“opioid receptor antagonist/agonist”) + (hydr)ox(y) + -one.

Related phrases

inverse agonist

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.