Category B - full version without watermark 720x576 (check terms and conditions at The version with watermark is for free to embed - Ecstasy's proper name is Methylenedioxymethamphetamine or M.D.M.A. for short. It was found that the use of MDMA severely damaged the neurons in the brain that transmit seratonin. Serotonin is the chemical that is used in learning, sleep, and integration of emotion. Users of the drug might be at risk of developing permanent damage that can manifest depression, anxiety, memory loss, and neuropsychotic disorders.