Boy, do you have MY number! I've wondered about the ADD myself, if it was a legitimate condition brought on somehow. However, I think it's more a product of burnout and, as classes get harder, your (my) previous study habits no longer working. Used to be you could pull an all-nighter reading the material once or MAYBE twice and test well the next day at recognition level. At higher levels, it's building on all previous classes.
So now, since you HAVE to study for 6 hour stretches, part of you knows this is not enough time anymore to do well. It is FEAR, I believe that causes this and self-doubt. If you're like me, then sitting down to make you study causes immediate drowsiness, the thought that maybe taking a nap first will leave you refreshed enough to get the job done... but basically only leads to sitting in front of the tv to fall asleep when you're no longer drowsy, and if you DO sleep, an hour of "waking up" routine before sitting down again to try.
Anyway, for those of us who are probably NOT clinically eligible for the disorder, I am rationalizing that the only way to get around this in the future is to genuinely study daily for a manageable hour or two. This will eliminate the crunch at the end and allow you to just top off something you at least already understand.
Either way, PLEASE understand that a fantastic short term memory will not serve you all that well in pharmacy school, there's just too much and the very language of the studying is somewhat foreign.
