High-Frequency Repetitive Transcranial Magnetic Stimulation of the Right Dorsolateral Prefrontal Cortex in PTSD

Inclusion Criteria: * Willing and able to give informed consent * Diagnosis of Post-Traumatic Stress Disorder as determined by the SCID * CAPS score of at least 40 * Males or females between 18-65 years of age * Willing to give up new psychotherapy or changes in psychiatric medications during the course of the TMS treatment. Exclusion Criteria: * Current primary Axis I disorder including Schizophrenia, Bipolar Disorder type I, Major Depressive Disorder * Patients with HDRS score ≥ 18 * A metallic implant in cranium (except the mouth) * Patients with severe or unstable medical conditions, which in the opinion of the investigator would interfere with their progress or safety * ECT treatment within the last three months * Patients with a history of epilepsy * Patients with neurological disorder leading to increased intracranial pressure * Participation in a new course of psychotherapy during the 24 days of the study * A new psychiatric medication within 6 weeks of enrolling in the study * Changes in psychiatric medication within 2 weeks of starting the study