adhd
"I was on this for ADHD and while I did see a noticeable improvement in my ability to concentrate and not be running around acting all hyper, it worked a little too well if you know what I mean. I had a heck of a time getting ready for school and I'd fall asleep on the bus ride there (I was in high school at the time). I also couldn't keep my head up in first period and would constantly snap awake at loud sounds or giggles in the classroom, not realizing I'd even fallen asleep. It wouldn't wear off until second or third period, so mornings were awful. I would be so zombie-like and sleepy no matter how much rest I got the night before. Eventually I quit taking it because I didn't like feeling like a walking corpse in the mornings."