ADHD is nothing but an excuse for lack of discipline. I used to doodle during class, and I still do on interminable conference calls. We used to call it boredom. But there are no convenient meds for that, nor does anyone cut you any slack for being merely bored.
Ban pharma from advertising and watch mental health improve. Never going to happen, of course, corruption - sorry, "lobbying," have to use first world terms here - is rampant in the US.