i have to wonder why your friend needs to take a drug to study during exam week
i went to college and carried a very high GPA and not once did i ever use a drug to study. I just DID IT.
your friend needs to spend less time looking at porn and playing with electronics and more time sleeping. college students seem to fuck themselves over when it comes to sleep, they live in dorms where there are parties all night and then they need a drug just to focus. and we wonder why ever 25 year old is on redbull and coffee all day