# naloxone

> English word · Noun · IPA /nəˈlɒk.səʊn/ · frequency rank #51,866

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

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/naloxone