MDMA Pills Powder Crystals is a drug that acts as both a stimulant and psychedelic, producing an energizing effect, as well as distortions in time and perception and enhanced enjoyment from tactile experiences.1,2 Typically, MDMA (an acronym for its chemical name 3,4 methylenedioxymethamphetamine) is taken orally, usually in a tablet or capsule, and its effects last approximately 3 to 6 hours. The average reported dose is one to two tablets, with each tablet typically containing between 60 and 120 milligrams of MDMA.