ADHD is, to my knowledge, caused by a too low reward mechanism in the brain. Ie, the brain constantly attempts to find something to get a dopamine release, cons

ADHD is, to my knowledge, caused by a too low reward mechanism in the brain. Ie, the brain constantly attempts to find something to get a dopamine release, constantly flicking to a new channel on the TV, so to speak, because it's incapable of finding a particular program interesting. The stimulants generally used allow the brain to get a reward for the current activity, pushing it over the threshold and allowing it to focus on an activity and pay attention to a situation. On the inverse, simply making the brain slower would yield similar results, IMO. It likely wouldn't fix it overall, you would still suffer from an attention deficit but the overall condition would slow down a bit. That might help a lot.