Methylenedioxymethamphetamine: 3-4 methylenedioxymethamphetamine (MDMA), best known on the street as "Ecstasy." An illicit drug, considered a recreational or party drug. It acts as both a stimulant and a hallucinogen. Ecstasy achieves its high by preventing the brain from reabsorbing the chemical serotonin, thereby prolonging its effects in the body.
