From the piracetam Wikipedia page:
# 4 Approval and usage
* 4.1 Aging
* 4.2 Alcoholism
* 4.3 Alzheimer's and senile dementia
* 4.4 Clotting, coagulation, vasospastic disorders
* 4.5 Stroke, ischemia and symptoms
* 4.6 Dyspraxia and dysgraphia
* 4.7 Schizophrenia
* 4.8 Preventive for Breath-Holding Spells
* 4.9 Closed craniocerebral trauma
It's a legal supplement, and isn't intended for use before MDMA, but after reading many trip reports from people who had restored a great deal of "magic" and lowered their tolerance from using it for a couple days before rolling, I gave it a try, and I was very impressed. It seems to potentiate the effects of stimulants in general (I got WIRED off coffee, which never happens, ever).