"it helps a lot with paying attention, on 30mg once a day and it works up until about 7th-8th hour (5 hours after taking it) and for me suppresses my appetite so i don&#039;t care if i eat or not. stomach still rumbles though. no other ill effects. i would recommend it. no jitteriness as with other stimulants such as ritalin/focalin. i feel much more like myself then on other medicines."