"This pilot study demonstrates that MDMA-assisted psychotherapy with close follow-up monitoring and support can be used with acceptable and short-lived side effects in a carefully screened group of subjects with chronic, treatment-resistant PTSD. In this group, MDMA-assisted psychotherapy compared with the same psychotherapy with inactive placebo produced clinically and statistically significant improvements in PTSD symptoms as measured by standard symptom scales. This difference was immediate and was maintained throughout the time period. There were no drug-related serious adverse events and no evidence of impaired cognitive function as measured by neuropsychological testing."

Source

Mithoefer, Michael C; Wagner, Mark T; Mithoefer, Ann; Jerome, Lisa; and Doblin, Rick, "The safety and efficacy of 3,4-methylenedioxymethamphetamine-assisted psychotherapy in subjects with chronic, treatment-resistant posttraumatic stress disorder: the first randomized controlled pilot study," Journal of Psychopharmacology (Cambridge, United Kingdom: British Association for Psychopharmacology, July 19, 2010) Vol. 24, No. 7, p. 11.
http://www.maps.org/mdma/ptsd…