A little over a month ago I posted about having to take my son to psychiatric assessment at the hospital. At that time his dr. prescribed risperidone. He is already on Concerta for ADHD. The risperdone seemed to help until the last week or so. He's had no angy outburts since he got on it, just regular teenage arguments, until this week. In the last week he has become very beligerant and angry. Last night he had a friend over, when it was time for his friend to go home he wanted to go to his house. His dad said no and that sent our whole evening down hill (I'm not blaming dad) difficult child started arguing about everything we asked him to do, he went back to his old "You love the girls better than me." (We have 2 younger daughters) Right before bedtime he came out and apologized and was very pleasant for the short time we had together. This morning he woke up and wanted to ride his bike to school. Last night I told him he was not going to get to ride his bike and he said fine. Well, when we wouldn't let him ride his bike because that was a consequence of his behavior he started with the beligerance again. I have class tonight and I take the kids to my parents since husband works 2nd shift. difficult child is saying he is not going to my parents house tonight. I'm afraid I'm going to end up missing class because of his behavior. Is it possible that his medicine has stopped working? If not what could be the cause for his behavior to go downhill again?