Assertion: methadone | /r/PartOf | the opioid family of drugs
Facets:
Source sentences:
text: Also known as Symoron, Dolphine, Amidone and Methadose, Methadone belongs to the opioid family of drugs.
text: Methadone hydrochloride (methadone) is a potent and long-lasting synthetic painkiller (analgesic) belonging to the opioid family of drugs.