The purpose of this study is to compare two slightly different methods of transcranial magnetic stimulation (TMS) to treat Post Traumatic Stress Disorder (PTSD)

This is a randomized single-blind pilot study investigating the efficacy of high-frequency repetitive transcranial magnetic stimulation (rTMS) applied to the right dorsolateral prefrontal cortex at either 10 Hz or 20 Hz as compared to a treatment as usual group for the treatment of Post Traumatic Stress Disorder (PTSD) symptoms.

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