The worst part of it was that he was convinced that his academic failures in life were due to his ADHD. Now we are both successful people in general. He's a software engineer in a major company. But since he couldn't figure out some simple math shit that was obvious to me, he thought he was being handicapped by his disorder. He refused to listen to my claim that everyone has a lot of stuff in math they just do by the rules they were taught and only realize later in life that there's an underlying concept. It is kinda the point of our education system because our young brains take more time to grasp the basics so we cram the rules and wait for the rest of cognition to catch up before teaching the basics.
He stopped taking the meds a while ago when he realized it wasn't doing him much good and realized that there's a limit to how smart people get and it is ok to not be born as next Terry Tao or something.