"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&#039;d fall asleep on the bus ride there (i was in high school at the time). i also couldn&#039;t keep my head up in first period and would constantly snap awake at loud sounds or giggles in the classroom, not realizing i&#039;d even fallen asleep. it wouldn&#039;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&#039;t like feeling like a walking corpse in the mornings."