Effects of Prazosin and Other Alpha-1 Adrenergic Antagonist Drugs on Nightmares and Sleep Disturbances in Posttraumatic Stress Disorder
Journal of Clinical Psychopharmacology March 12, 2026 Olga Ponomareva, Sean R. Stetson, Bruce Meltzer et al.
Chronic insomnia, common in PTSD, leads to depression, cognitive impairment, and substance abuse. Sleep abnormalities in PTSD include trauma-related nightmares, prolonged sleep latency, frequent interruptions, and disrupted sleep cycles. This review examines pharmacological treatment for nightmares, focusing on noradrenergic signaling and alpha-1 adrenergic blocking agents like prazosin. Randomized controlled trials suggest prazosin's clinical efficacy for PTSD-related nightmare disorder in subpopulations. Case studies, pilot, and open-label trials indicate possible clinical use of terazosin, tamsulosin, and doxazosin, but further RCTs are needed. Prazosin has the best evidence base; when not feasible, alternative alpha-1 blockers may be effective in a subset of patients.