I've never heard about - and experienced myself - such erythropoiesis stimulation side effect of Nootropil. Is it documented in multiple solid studies somewhere? I'm wondering about whether it might be a potential side effect of a very limited scope (i.e., affecting only a small subset of people).

I have never tried modafinil (or any other nootropics) - will read more about it. However, based on my very brief review, it appears to be much less safe than Nootropil along with a questionable effectiveness as a "cognitive enhancer". Plus, unlike Nootropil, it is considered a controlled substance in the United States.