Help with son?

I'm not sure if this is the place to put this but I'm gonna give it a shot. I worry a lot about my kids. A LOT! My 13 year old daughter has a touch of anxiety. I have depression and anxiety and my 9 year old son has ADHD and now I am thinking depression too. But that's for another place.

Anyways. My son he is on medication and it seems to work well. Down side is it can suppress his appetite and he's already tiny. So weekends I don't give him meds. My folks say this is bad as he still needs it. But I still don't give it. So what I'm looking for is ideas on what to do. He's not a bad kid. Not at all. Just spastic I guess. He can't focus. So sometimes on the weekends he's harder to deal with. He won't let things go. He's also OCD. Any ideas on how to help him deal with the extra energy on the weekends?