work again? Ive been taking it for 9 months and I'm at the highest dose 60mg a day. 20 mg 3 times a day short acting. Last like 2 hours.I'm not as productive as I use to be and starting to not learn anymore.It's like my brain doesnt remeber things anymore during reading and lectures. I was taking it everyday. so I'm wondering if I stop for a week or so, will it go back to working again once my body has not gotten use to the everyday dose?