I have a 9 year old that has become obsessed with a friend. He's never had this problem before and I'm starting to wonder if it's the medicine. He has suffocated this friend so much that she no longer wants to be friends with him. It is like he can not control his actions and he's becoming impulsive all over again. I am very concerned because I feel like my son having ADHD has already made him socially awkward. Has anybody else had this problem with Concerta? Any advice or help would be greatly appreciated.