Methylphenidate
"My 7 and 11 yr old children take 18mg and 36mg respectively. The 7 yr old also takes a 5mg Methalin tab at about 3PM because she melts into a screaming pile of shattered emotions otherwise.  Actually, that's how she was ALL THE TIME before she started taking Concerta. The 11 yr old recently increased his dose because he's getting older and bigger.  He was singing/humming/noise making in class again (which is what clued me in to a higher dose. He started taking Concerta because he couldn't access information when doing homework. The information was there, he just couldn't concentrate long enough to access what he needed. VERY frustrating for him. He isn't hyperactive like the other child, so he was diagnosed at a later age. Side effects: sleepless until 12AM."