I suffer from the same problems ;P

I have a link which may explain what's going on for you:

http://www.youtube.com/watch?v=qOtoujYOWw0

In reality though, I'm not a fan of drug therapy. I've taken MANY different types of drugs and honestly the best thing a doctor ever did for me was help me monitor my diet. Once I started keeping my vitamin levels in check with my relatively high metabolism (specifically vitamin e and magnesium) I found it considerably easier to focus on tasks.

Either way, good luck.