Efficacy of cyproheptadine for nightmares associated with posttraumatic stress disorder.

A retrospective review of the psychiatric records of nine patients with posttraumatic stress disorder (PTSD) was conducted to determine the efficacy of cyproheptadine in relieving nightmares. The treatment dose was 4 to 12 mg at bedtime. The response varied from complete remission to a decrease in the intensity and frequency of nightmares.