MOLLY PILLS , MDMA Pills Powder Crystals is an 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.