Overview CAP: Doxazosin in the Treatment of Co-Occurring PTSD and Alcohol Use Disorders Status: Completed Trial end date: 2019-12-16 Target enrollment: Participant gender: Summary The proposed study will examine the efficacy of doxazosin in the treatment of PTSD and alcohol use disorder or substance use disorders. Phase: Phase 2 Details Lead Sponsor: Medical University of South CarolinaVA Office of Research and DevelopmentCollaborators: Medical University of South CarolinaRalph H. Johnson VA Medical CenterTreatments: Doxazosin