for a very long time if not forever. His mood stability was breaking down, he started not eating at all during the day. He is 9 years old, about 4 feet tall and weighs 55 lbs!! My 6 year old nephew weighs more than him, and he is at a healthy weight. His mood was awful, very sensitive and teary. We were at a concert last night and twice he got so upset about being told no that he started to cry. This is very out of character. He has been snapping out answers when asked questions. psychiatrist wanted to try stims while he was on a mood stabilizer, and honestly I really really wanted them to work. But they don't. They make it all worse. Why he can take them for about 2 weeks and be fine, then it all goes down the toilet, I don't know. It is always about 2-3 weeks. I would rather have a hyper happy child than the one I saw last night.