"my son is 6 they started him off on concerta he seemed fine we had minimal complaint the only downside is everyday around 7 he would be in moods over silly things, but it would pass. now the vayvanse had him in &quot;hulk&quot; mode as he would describe it. he was very snappy and angry and became aggressive with the kids at school, (which was never an issue before). i hated that stuffed. i&#039;m beginning to realize that finding the right meds is going to be a huge task."