Ketamine and Prolonged Exposure in PTSD

Subjects will receive a single infusion of racemic ketamine at 0.5mg/kg (ideal body weight) for 40 minutes. The next day, patients will have a standardized prolonged exposure session which lasts approximately 90 minutes. This co-jointed intervention will be repeated for 3 weeks. Then, patients will continue with therapy sessions to complete a total of 10-12 sessions.