At what rate of use did it become a problem?
I'm basically asking, do you think once every 2-3 weeks will be an issue? I think something about relying on it, even at 2-3 weeks, might make it an issue long term. But I'm not sure.
It doesn't affect me the same way as it did 10 years ago when i first tried. Back then it was euphoria and now it's just slight concentration. Which is ideal for working. But the euphoria is mostly gone.