U.S. Proof of Principle Study: Results of Long-Term Follow-Up Submitted to Scientific Journal

On February 5, 2012, after extensive work, the lead investigator of our first U.S. study of MDMA-assisted psychotherapy for PTSD and co-authors submitted a paper describing the results of our long-term follow-up of subjects who participated in the flagship study. The paper was submitted to a peer-reviewed scientific journal and is now being reviewed for publication. In the original study, 17 of 21 subjects no longer qualified for a diagnosis of PTSD after treatment with MDMA-assisted psychotherapy. The long-term follow-up, conducted an average of 3.5 years after treatment, demonstrates that these benefits were, on average, maintained over time. Additionally, of the subjects who were seeing a therapist prior to the study, 45% were no longer seeing one at the time of the follow-up survey; and 55% of those who were receiving psychiatric medications prior to the study were no longer taking them. Two subjects who participated in the original study experienced a return of symptoms during the long-term follow-up period and will be offered enrollment in our relapse study of MDMA-assisted psychotherapy for PTSD, where they may receive one additional full-dose MDMA session.