Is narcotic addiction a chronic disease?
D002908:Chronic Disease; D003932:Heroin / Q000009:adverse effects; D006801:Humans; D008691:Methadone / Q000627:therapeutic use; D013375:Substance Withdrawal Syndrome; D019966:Substance-Related Disorders / Q000188:drug therapy*
D003932:Heroin; D008691:Methadone