dude i was on like 50's and it messed me up for real! i mean like i was mad focused, i really think it did alot of damage tho cause people say in certain situations that i was never this way before i took the medication for that period of time. like i mean i just stare'd at the clock for a while once, not zoning out or anything just got so focused on the clock that i couldn't do anything else, that and i had wicked bad mood swings.