Term: naltrexone
IPA: nælˈtɹɛk.səʊn, nælˈtɹɛkˌsoʊn

==English==
[[File:Naltrexone skeletal.svg|thumb|Chemical structure of '''naltrexone''']]
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===Etymology===
Probably from {{af|en|naloxone|tres|lang2=la|t2=three}}.

===Pronunciation===
* {{IPA|en|/nælˈtɹɛk.səʊn/|a=RP}}
* {{IPA|en|/nælˈtɹɛkˌsoʊn/|a=GA}}

===Noun===
{{en-noun|-}}

# {{lb|en|pharmaceutical drug}} A [[synthetic]] drug, similar to [[morphine]], which blocks [[w:opioid receptor|opiate receptor]]s in the [[nervous system]] and is used chiefly in the treatment of [[heroin]] [[add