I agree (and have ADD running through the family, so I KNOW what that is about).
We are just too happy to pop a pill for anything nowadays (those silly commercials are obviously having an impact - but I blame US the consumers, not to pharmaceuticals!).
It is possible to apply principles of discipline to the mind as well as the body. We can just exercise pulling our thoughts back to the matter at hand. Like any exercise, it takes a little time and practice, but if merely discipline is the problem (which I think it often is), it will work in short order.
Everyone's mind wanders at various times throughout the day. So unless you are really into popping pills and living with whatever impact they may have, why not try a little mental exercising. If you are really distracted, go do something else for a while, then come back to your studies.
(Sorry if I'm sounding a little harsh. At the moment, they are talking about putting my 16 year old niece on medication for "anxiety" and it's driving me nuts. They have tried ANYTHING else - no relaxation techniques, no stress management, nothing - just pop a pill.)
Good luck with your studies! (Of course you didn't mention whether it was boring stuff. It's always hard to concentrate on that! :-) )