Earlier quoted context omitted.
source please sir
https://link.springer.com/article/10.1007/s00213-004-1791-0
“Our findings suggest that even a first low cumulative dose of Ecstasy is associated with decline in verbal memory. Although the performance of the group of incident Ecstasy users is still within the normal range and the immediate clinical relevance of the observed deficits is limited, long-term negative consequences cannot be excluded.“
I’m curious to see if there are, or have been any studies in the long term effects?