Rapamycin as a Means of Interference With Reconsolidation of Posttraumatic Stress Disorder-related Traumatic Memory

The purpose of the proposed study is to determine if pairing reactivation of a traumatic memory with a single administration of Rapamycin (e.g., Sirolimus) in men with combat-related Posttraumatic Stress Disorder leads to a reduction of the emotional strength of that particular traumatic memory. The following hypotheses will be tested: 1. Traumatic memory reactivation paired with a single dose of Rapamycin will decrease objective measures of stress and self-report of stress during replay of the traumatic memory, relative to, subjects receiving placebo. 2. Pairing administration of Rapamycin with traumatic memory reactivation will decrease symptoms of Posttraumatic Stress Disorder one month and three months later, relative to patients receiving placebo.