Methadone hydrochloride magani ne na narcotic na roba wanda ake amfani dashi azaman analgesic na dogon lokaci don kula da jin zafi, da kuma maganin dogaro na opioid da jaraba. Methadone hydrochloride fari ne, lu'u-lu'u foda wanda ke narkewa cikin ruwa da barasa. Yana aiki ta hanyar ɗaure masu karɓa ɗaya a cikin kwakwalwa wanda opioids ke ɗaure su, amma yana da tsawon rabin rayuwa fiye da yawancin opioids, wanda ke taimakawa wajen rage alamun janyewa da sha'awar. Methadone hydrochloride abu ne mai sarrafawa kuma yana iya zama mai jaraba sosai, don haka yawanci ana ba da shi kawai ƙarƙashin kulawar likita.