- - In the world of psychotropic medication, the question is not just whether it works or not, but whether it works better than a placebo and whether the effect size is clinically significant and the benefits outweigh the risks. In the case of MDMA (aka molly or ecstasy), the effect size for improving post-traumatic stress disorder symptoms reported by researchers has been very large. Often it is found to be two to three times higher than is often found for serotonin reuptake inhi...