Is prazosin effective for PTSD-associated nightmares?

Prazosin provides significant relief in small study of combat veterans

A 2013 RCT evaluated the effect of prazosin on nightmares in 67 soldiers with combat PTSD.² All patients met criteria for PTSD as outlined in the Diagnostic and Statistical Manual of Mental Disorders, 4^th edition. Men received doses titrated to a mean of 4 mg in the morning and 15.6 mg at bedtime; women received a mean of 1.7 mg in the morning and 7 mg at bedtime.

After 15 weeks, the CAPS-B2 score decreased by 3.1 for prazosin compared with 1.2 for placebo (P<.05).