Just to endorse the other advice you got. We had a son who everyone thought was ADHD but now it would appear is more bipolar or severe mood disregulated. It matters, because some medications will help and others won't.
If you are interested in doing some reading, I --and many others here--can strongly recommend THE BIPOLAR Child. there is an interesting discussion on adhd vs. BiPolar (BP), and a very good sections on medications. Read the first few chapters and you will get a very useful overview.
My own personal experience is that many child psychologists are quick to say ADHD when in fact more complex things may be going on. When those things are going on, then the classic ADHD drugs may not be the best ones to start out with.
Good luck.
