Overview The Effect of Dexmedetomidine on Postoperative Analgesia Status: Completed Trial end date: 2012-02-01 Target enrollment: Participant gender: Summary The purpose of this study is to determine whether additional Dexmedetomidine to patient controlled analgesia can reduce fentanyl consumption. Phase: Phase 4 Details Lead Sponsor: Seoul National University HospitalCollaborator: Pharmbio Korea Co., Ltd.Treatments: DexmedetomidineFentanyl