^ I use it (or used it) as a similar reason for you, i found it fantastic. Modalert is the best brand, 200mg has you, not high, no inkling to take more, but just sharp, foxused and on the ball. You barely even notice you've taken it, its just like one of those days where you're on fire, get everything done that you meant to etc.
Absolutely no urge to take more or addiction potential, and i found it didnt stop me sleeping (if yo utake it later in the day it might and varies person to person)
Infact, i've still got some lying about ima have one tomorrow and have another crack at that washing machine lol