Opiate antagonists and 'blockers'.
D003496:Cyclazocine / Q000009:adverse effects / Q000627:therapeutic use; D006801:Humans; D007977:Levallorphan / Q000494:pharmacology; D008691:Methadone / Q000494:pharmacology; D009269:Nalorphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D019966:Substance-Related Disorders / Q000188:drug therapy*
D009292:Narcotic Antagonists; D007977:Levallorphan; D009270:Naloxone; D003496:Cyclazocine; D009269:Nalorphine; D008691:Methadone