I've got ADHD as well, and I'm on meds for it. I'm also fairly certain that I have Asperger's (but no dx yet), and the two often go together.
Anyway, the meds make me much more able to do stuff and to remember to do stuff. Getting enough sleep and exercise is also very important! These priorities don't compete with my other priorities... they enable them.
I'm still not 100% where I'd like to be, but at least no one close to me doubts that I'm doing all that I can for them or that I really care about them. And that, I think, is what he should ultimately be shooting for.