Hello!
I wonder why they would want to medicate a 5 year old? I am in no way a health care professional, but to me it seems as if they may be jumping the gun a bit.
I have a 5 year old boy also, whom I fear may have some developmental problems, very similar to your son's. We had him evaluated by a psycholgist during the summer, because we were concerned about him starting school in the fall. I discussed my feelings about ADD, and ADHD with her and after his evaluation she told me that she felt that he was immature for his age, and that it was just too soon to tell for sure what he might grow out of and what problems may not go away with time.
I don't know your son's medical history, but since he is only 5, perhaps some of this will work itself out without medication. If, in fact the Dr. feels that the medication is nessesary, I would ask him and also reasearch myself for any information about side effects, or dependence that this medication causes. I do know is some cases, as was the case with my niece, the medication perscribed for a similar problem caused more problems than the condition itself.
I do hope everything works out for the best for Tyler, and you too, because I know how frustrating it can feel to go through this type of thing.