G.D.
Add medication is usually a stimulant. My son is taking adderal which has helped him tremendously. I've asked him about how he feels about taking it, he's in the 8th grade and has been medicated since the 4th grade. He chooses to take it because he knows that it helps him focus. He doesn't have people yelling at him to get his attention or talking down to him because he can't focus on specific tasks.
As a part time teacher, I have seen benefits of caffeine in a childs morning diet. He has a cup of coffee in the morning and can stay on task. We have experimented with him and he does not do well at school when he doesn't have the coffee.