MDMA Drug Description3,4-Methyl​enedioxy​methamphetamine, commonly known as ecstasy or molly, is a psychoactive drug primarily used for recreational purposes. The desired effects include altered sensations, increased energy, empathy, as well as pleasure. When taken by mouth, effects begin in 30 to 45 minutes and last 3 to 6 hours. Wikipedia Formula: C₁₁H₁₅NO₂ Drug class: empathogen–entactogen; stimulant Other names: 3,4-MDMA; Ecstasy (E, X, XTC); Molly; Mandy Duration of action: 4–6 hours Onset of action: 30–45 minutes (by mouth) Metabolism: Liver, CYP450 extensively involved, including CYP2D6 Elimination half-life: (R)-MDMA: 5.8 ± 2.2 hours (variable); (S)-MDMA: 3.6 ± 0.9 hours (variable)