Chewing the capsils is not a good thing because it can break the time release but its not what kept him up all night. I am on 20mg Adderal Xr and I cannot sleep at night bc adderal is an
amphetamine which means its like legal speed. Maybe you should switch him to a non XR pill I am going to my doctor to switch over so I dont have to take sleeping pills to fall asleep.
Good Luck.