I’m 37 and was diagnosed with ADHD at age 8. I had it bad, for lack of a better term. I could not focus in class at all, in fact, in grade 2 the teacher dealt with my inattentive/disruptive behavior by putting me in the back of the class facing the wall. I was on Imipramine and other meds early on and in my tweens, but eventually went off of them. Over time I managed to cope, but at some point in my early/mid 20s it became evident to me that I just didn’t have the the problem anymore. No, I’m not just masterfully coping and deluding myself. I genuinely do not struggle to focus any more, nor do I have bouts inattentive “hyper-focus”. It is as if my ADHD just magically disappeared one day, and when I tell people this no one who knows anything about the subject (or thinks they do) ever believes me. But I know how I was and I know how I am now. It is possible.