MDMA is a synthetic drug that has both stimulant and hallucinogenic properties. Also known as "ecstasy" or "molly," MDMA is often used as a party drug, due to its ability to produce feelings of euphoria and increased empathy. But MDMA is also being studied as a possible treatment for a variety of mental health conditions. While more research is needed to determine its efficacy, MDMA therapy shows promise as a treatment for conditions like PTSD and social anxiety.