Overview Study of Using Long Acting Antihistamine to Treat Opioid Induced Itching Status: Terminated Trial end date: 2017-11-01 Target enrollment: Participant gender: Summary The purpose of this study is determine if long acting antihistamine like cetirizine can help with itching induced by opioid pain medications. Phase: Phase 4 Details Lead Sponsor: Virginia Commonwealth UniversityTreatments: CetirizineHistamine AntagonistsHistamine H1 Antagonists