I seriously doubt it. I don't really think there is some magic cure for that, really. Speed might take some of the mental fog away but taking that certainly isn't advisable.
Try different sativas and eventually you'll find one you can function on. Either that or smoke less or not at all. Sorry if that's not the answer you're looking for.
I think a lot of people on Bluelight make piracetam and some other nootropics out to be some sort of panacea that will turn you into a high achiever over night, which it most certainly is not. They have their place and do work in some people, but they don't have the miraculous effects some people seem to suggest they do.
Drink duff beer.