ADHD can be genetic, so it’s possible you have it too.
The great news is that your son accepts his ADHD and is getting treatment, for himself and his kids.
The best thing you can do to support your family is learn all you can about ADHD so you understand them. And, of course, be there for whatever they need in the way of support.
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism