Post-traumatic stress disorder (PTSD) is a trauma and stress-related disorder characterized by re-experiencing, avoidance, hyperarousal and negative alterations in cognition or mood. Events that involve threat to integrity of self or others such as rape, physical assault, natural disasters and combat exposure are commonly associated with the development of PTSD.1 The lifetime prevalence of PTSD among adults in the United States ranges from 6-10%, with women being more than twice as likely to have PTSD at some point. Significantly higher estimates have been reported in combat veterans (15-30%). Rates of PTSD in veterans are higher if they were stationed in combat zones, had tours of longer than one year, experienced combat or were injured. Specifically, among veterans with deployments to Iraq and Afghanistan, 31-86% report multiple traumatic combat exposures and 11-20% endorse significant PTSD symptoms.