To add to this discussion, I think it is also hard to come up with a clear diagnosis on young people (children and teens). For instance, bipolar is sometimes diagnosed as ADD or depression... if the diagnosis is wrong chances are the meds to treat the illness are also wrong. I've witnessed this first hand. My teenage son was initially diagnosed as suffering from depression, anxiety, and add. Was given prescriptions to treat the diagnosis. After a few months he attempted suicide. The meds weren't helping. He was finally diagnosed as Bipolar and the meds he is now on are helping him tremondously.