Serotonine depletion isnt the nature of the drug at all, its actually a sign of neurotoxiticy, and its something they look for when checking wheter a drug is neurotoxic or not.
Source that axons are recovering after 20 weeks?
what i meant by the nature of the drug was: imagine a dam right? open the dam, flash flood, then a slow trickle (the last phase being analogous to the depletion and the water to the serotonin).
sorry bout the no quote just off the top of my head, looks like i was wrong and the recovery time is a bit more considerable (12 months actually) heres the quote for that:
"Time Course of Regeneration of 5-HT Uptake Sites:
...At the 6 month time point, the density of 5-HT uptake sites was only 75% of the values of saline-treated controls whereas by 12 months after MDMA treatment the density of 5-HT uptake sites returned to control levels."
MDMA-Induced Neurotoxicity
Parameters of Degeneration and
Recovery of Brain, Serotonin Neurons
GEORGE BATTAGLIA, S. Y. YEH AND ERROL B. DE SOUZA'
Neuroscience Branch, Addiction Research Center
and something very interesting i just found, a study that shows perhaps low level doses of MDMA will prevent 5-HT damage. whaaat?! heres the article:
http://www.ncbi.nlm.nih.gov/pubmed/19555677
Brain Res. 2009 Aug 25;1286:32-41. Epub 2009 Jun 23.
Repeated exposure to MDMA provides neuroprotection against subsequent MDMA-induced serotonin depletion in brain.
Bhide NS, Lipton JW, Cunningham JI, Yamamoto BK, Gudelsky GA.
College of Pharmacy, University of Cincinnati, Cincinnati, OH 45267, USA.
National Institute on Drug Abuse, Baltimore, MD 21224
sorry for the confusion :D