My difficult child was not sleeping, I don't know how he even made it through the day, he was getting no more that 5hrs of sleep a night for days on end. He is on Concerta so we knew this was the reason why, but we can't take him off because he just can't cope. Our pediatrician, told us about Melatonin, she explained that they don't know the long term effects, so we were a little leary, but thought we would try it. WOW!! He has been sleeping with no problem, our mornings are so much better, he wakes up refreshed and happy. His whole day is just better than it ever was, I'm really happy with the change.