Personally, I wouldn't start trying ADHD meds if you know there's a sleep issue. Sleep issues can cause all the same symptoms as ADHD. If your doctor hasn't already, contact a sleep clinic!

You could try supplementing fish oil. A lot of ADHD folks have seen some improvements by adding Omega-3 to their diets (typically at a higher dose than is typically recommended.) I believe the recommended for a kid is one gram a day (many only have a few hundred milligrams, so you've gotta read the labels! You also want to look for one that's got a 4:1 ratio of Omega-3 to Omega-6.)

~amy