My current understanding from the research I've read but don't have to hand: a) A lot of people with ADHD also have autism so the symptoms get lumped together b

My current understanding from the research I've read but don't have to hand: a) A lot of people with ADHD also have autism so the symptoms get lumped together but ADHD's actual symptoms (executive function issues, time blindness, rejection sensitivity, unexpected drug interactions etc) are completely unrelated b) ADHD symptoms never go away, adults just learn to hide them and develop coping strategies because it's largely socially unacceptable to be weird