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ABSTRACTTrauma content nightmares and sleep disturbance are among the most distressing and debilitating symptoms of military posttraumatic stress disorder (PTSD). We performed a randomized placebo-controlled trial of prazosin, a brain-active alpha-1 adrenoreceptor antagonist, for PTSD nightmares, sleep disturbance, ability to function, and overall PTSD severity in 67 active duty Service Members returned from combat deployments in Iraq and Afghanistan and stationed at Joint Base LewisMcChord, Washington. Prazosin or placebo were titrated upward over six weeks guided by trauma nightmare reduction. Achieved doses were continued for an additional nine weeks. Mean achieved prazosin doses were 4.0 +/-1.4 mg at midmorning and 15.6 +/-6.0 at bedtime. Prazosin was significantly superior to placebo for reducing trauma nightmares, improving sleep quality, improving global function and reducing total PTSD symptom scores. Prazosin was well tolerated, with no differences between prazosin and placebo on blood pressure or adverse events.These results suggest that prazosin is a useful treatment for combat-induced PTSD in active duty Service Members with distressing nighttime PTSD symptoms.
Body:Active duty OEF/OIF/OND combat-experienced Service Members with PTSD and frequent distressing combat trauma nightmares were recruited through banners on post, educational briefings with commanders and Army medical providers, and "word of mouth." Six weeks of flexible dose titration guided by treatment effect on trauma nightmares were followed by 9 weeks at the achieved dose for a total study duration of 15 weeks. Previous clinical prazosin experience with OEF/OIF/OND Service Members and Veterans suggested that higher doses than previously used in Vietnam Veterans often were necessary to achieve adequate symptom reduction. Therefore, maximum prazosin dose regimen was 5 mg midmorning and 20 mg at bedtime. Primary outcome measures were the "nightmare" item from the Clinician Administered PTSD Scale (CAPS), the Pittsburgh Sleep Quality Index, (PSQI), and the Clinical Global Impression of Change (CGIC) anchored to ability to function at work and at home. Secondary outcome measures were CAPS total score, CAPS subscale scores, PSQ-9 depression score and Quality of Life Index. Behavioral, blood pressure and adverse event ratings for analysis were obtained at weeks 7, 11 and 16. An intent to treat mixed effects model analysis of all data from randomized subjects was performed.
Key Research Accomplishments1. We successfully complet...