A google search shows a very limited amount of research on aniracetam. The patent was originated by Hoffman Roche in 1993. I have seen it referenced as far back as 1983 but only in rat studies or in the senile elderly.

Many of the references are copies of the same report or article.

I find it interesting that it is a prescription drug in Europe but sold over the counter as a food supplement in the USA.

Can you point me to some of the hundreds of human studies?