[Question] on the approximate rise of tolerance with certain noots

Currently I'm raking Modalert, not on a set schedule, just when I fee like it (~3x/week), along with Lift,mode, and occasionally Galantine.

My mother lives in France and Piracetam is legal there, so she is bringing back a year supply (I'm going to grad school at 'Tech).

Im wondering about the details surrounding Piracetam and Modalert, is there a tolerance buildup? Would you need to increase dosage to get benefits? Any interaction warnings? Im looking for the best cognition boost, I cannot find where to buy legit Noopept.