I had that problem when I was younger. I'm 45 now. I changed the way I communicated when I had children. I realized that my kids were going to suffer if I didn't control my sarcasm- or worse they would be like me...In my opinion the best method for changing this behavior is to realize that even though we (ADD people) do have impulse issues when it come to our verbal communication- we also have choice. Sometimes it seems like we do not have a choice because the time space between impulse and action is a nano second- but we really do have the choice. Learn to feel when when your comments are going to cause someone else to feel bad- stop the comment when you are in the feeling stage. Just stop and exercise the choice to be quiet. Trust me your life will be more peaceful and the people in your life will be happier.