Buprenorphine.
D002047:Buprenorphine / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D006801:Humans; D009019:Morphinans / Q000627:therapeutic use*; D010146:Pain / Q000188:drug therapy*; D010149:Postoperative Pain / Q000188:drug therapy
D009019:Morphinans; D002047:Buprenorphine