TOPICS: MDMA, ecstasy, 5-ht, dopamine and ne reuptake inhibitor, tachyphylaxis, hallucinogenic stimulant, hyperactivity, distorted perception of time and senses, euphoria, disinhibition, life-threatening serotonin syndrome, life-threatening hyperthermia, life-threatening sinus tachycardia, life-threatening hyponatremia which cerebral edema, difficulty concentrating, depression, loss of appetite, fatigue