We report the case of an acute cerebral hemorrhage after one "ecstasy" tablet in a 21 year old woman without any relevant medical or surgical history. The status showed a right sensorimotor syndrome. The CT-scan and the MRI revealed a left cerebral hemorrhage. The patient only partially recovered her neurological functions after one year. The discussion deals with the effects and dangers of 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) which is systematically used in night parties or "raves".