My son is 6 and has been on Vyvanse for a year now. He just started Intuniv 1mg a week ago. Ever since he has been unable to go to sleep until 10 or 11pm... usually is asleep by 8pm. I started giving him the Intuniv in the AM's for the first 5 days. There was minimal sleepiness during the day... at his normal bedtime he was wide awake. Tonight is the first night I have given it to him in the evening with dinner. He was asleep by 9pm which is a lot better but I am worried about drowsiness in the morning... although I have not seen hardly any since starting the med. Drowsiness is one of the main side effects of Intuniv but he seems to be having the opposite problem. Has anyone else experienced this? Thanks for any feedback!!