The results of this study show that lab animals who had been exposed to the drug known as Ecstasy, at levels comparable with human usage, experienced damage to brain serotonin neurons. After seven years had lapsed since original exposure to Ecstasy, the brains of the lab animals were tested to determine if the brain had repaired the damage previously done by the drug. Test results show that while several areas of the brain repaired the damaged serotonin neurons back to normal levels there were still multiple areas that showed little or no repair; an indication that the damage to brain serotonin neurons is permanent. Experimenters theorize that there may be a relationship between the proximity to the center of the damaged area as well as severity
