gaaaaaaaaaah. that's awful. my dad didn't react positively either. for years after I started taking 'em he would ask if "that focus problem is behind you yet", no matter how many times I explained to him that no, this is just how my brain works
I have to admit, going in, I did not really believe in ADHD, I thought it was more bad nutrition, too much sugar, etc. I denied it was a 'real thing'. Now, living with it, seeing first had with my son. I totally get it. It is real. Also, the medication really really helps!