Concerta/ritalin/etc are sit down and shut up drugs. It makes you feel neurotic and trapped inside your own head so you're not as physically disruptive as a healthy kid should be. It leads to paranoia and anxiety that you only grow accustomed to and can't grow out of. The lack of appetite stunts development. Just look for real world stories of people who've taken these drugs and paid more attention to what happened to themselves than "yeah I was less disruptive."
