You might ask your doctor for a very, very low dose of Risperdal, like 2.5. It’s an antipsychotic, but it works very differently on kids with ADHD and calms down my son’s evening impulsiveness. I don’t think increasing his current meds is a good idea either as concerta usually blocks appetite. Since he’s on a methylphenidate based drug you might want to talk to the doctor about switching to Daytrana (a patch) or Quillivant (a liquid). Neither of those have interfered with my son’s appetite. Of course, all kids respond differently. Or you can get dinner into him earlier and into bed and avoid more meds altogether.