We still don't have a super strong idea of exactly what is going on but we know that it has to do with dopamine and norepinephrine and that a number of brain st

We still don't have a super strong idea of exactly what is going on but we know that it has to do with dopamine and norepinephrine and that a number of brain structures are noticeably different in people with ADHD. https://en.wikipedia.org/wiki/Attention_deficit_hyperactivity_disorder#Pathophysiology https://en.wikipedia.org/wiki/Attention_deficit_hyperactivit... it's actually kind of hard to find an array of good medical sources googling for the second claim because there is so much anti-abuse stuff flooding results for a non-medical professional like me, but its somewhat intuitive in that raising dopamine levels from low to normal will have a different perceived effect than raising them from normal to high. There is perhaps a philosophical argument to be had but from a clinical standpoint my understanding is that there is a world of difference in the outcomes.