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A potent synthetic narcotic drug, C21H27NO, that is less addictive than morphine or heroin and is used as a substitute for these drugs in addiction treatment programs. It may also be used for chronic pain management.

[Short for methadone hydrochloride : (di)meth(yl) + a(mino) + d(iphenyl) + (heptan)one, a ketone (heptan(e) + -one).]


(ˈmɛθəˌdəʊn) or


(Pharmacology) a narcotic analgesic drug similar to morphine, used to treat opiate addiction. Formula: C21H27NO
[C20: from (di)meth(yl) + a(mino) + d(iphenyl) + -one]


(ˈmɛθ əˌdoʊn)

also meth•a•don


a synthetic narcotic, C21H28ClNO, similar to morphine but effective orally, used in the relief of pain and as a heroin substitute in the treatment of heroin addiction.
[1947, Amer.; meth (yl) + a (mino) + d (iphenyl) + (heptan)one a ketone derivative of heptane]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.methadone - synthetic narcotic drug similar to morphine but less habit-formingmethadone - synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction
narcotic - a drug that produces numbness or stupor; often taken for pleasure or to reduce pain; extensive use can lead to addiction


[ˈmeθəˌdəʊn] Nmetadona f


n (Pharm) → Methadon nt


n. metadona, droga sintética potente de acción narcótica menos intensa que la morfina.


n metadona
References in periodicals archive ?
Peter found a job with Methenex, a large chemical company, and they boarded a flight from Teesside Airport in 1984.
She says: "We were tired and disorientated when we arrived but there was someone from Methenex there to meet us.
Peter has continued to work at Methenex while Sandra worked as a secretary at the local High school until four years ago.