Recent clinical trials, including one soon to be published in Nature Medicine, have suggested that MDMA combined with psychotherapy may help treat post-traumatic stress disorder, or PTSD. The news generated considerable optimism and excitement in the media, and some in the scientific community. As a psychiatrist and an expert in neurobiology and treatment of PTSD, I think these developments may be important – but not the major breakthrough that some people are suggesting. This approach is not a new magic bullet. A combat veteran discusses his experience with PTSD. PTSD, a disorder of emotional memories Post-traumatic stress disorder is a result of exposure to extreme traumatic experiences, such as natural disasters, motor vehicle accidents, assault, robbery, rape, combat and torture. Based on the type and severity of the trauma, people may develop PTSD, a condition of heightened anxiety that includes flashbacks, nightmares and avoidance of any reminder of trauma.