My oldest has ADHD. He was diagnosed during Kindergarten -- almost 2 years ago now. He takes Concerta and has for almost that long. About every 6 months we notice the meds are not quite as effective as they were and have had to adjust the dosages. Recenty, we also put him on Intuniv in addition to the Concerta. This combination has been working very well. The biggest problem we were having is that Isaac would have no impulse control, was completely unable to focus and it was like he was driven by some unforseen motor. The first day he took the meds, he sat at our kitchen table and colored for 5 hours straight. He is just much more calm with the meds on board and he is able to focus at school and is excelling with his academics. I know meds aren't the answer for everyone or every child with ADHD, but for us, the meds have been a necessity. We also do behavorial therapy too and this has helped as well.
On a side note Sara -- I know JJ just went through the whole broken arm thing -- and if I remember correctly it was a trip and fall or something like that. But one of the things our pediatrician was concerned about in Isaac's case was that he too had a broken arm at the beginning of Kindergarten and she told us that a lot of times kids with ADHD are unable to make completely safe choices for themselves because they are so impulsive -- they may know whatever they are doing is wrong, but they can't get their brains to act quickly enough to stop themselves. I don't know about JJ, but Isaac would constantly jump off of things he shouldn't, or do things that were completely unsafe, but it was like he couldn't stop himself. Now, he at least has more control and is able to keep himself a little more safe.
Good luck! ADHD and the meds are not fun by any means, but the meds and his therapy have made a huge positive impact for Isaac and his ability to succeed in school!