3,4-Methylenedioxymethamphetamine (MDMA), commonly known as ecstasy (E), is a psychoactive drug used primarily as a recreational drug. Desired effects include increased empathy, euphoria, and heightened sensations. When taken by mouth, effects begin after 30–45 minutes and last 3–6 hours. It is also sometimes snorted or smoked. As of 2017, MDMA has no accepted medical uses.