Lil Man At War

My son is 5 years old an has suspected Add/Adhd. It pains me to see this little man at war with himself and his family. I know I did nothing wrong to cause him to have this pain and grief. This Anger and Frustration. I do often blame myself for his illness.
  Hes ultimately at war with himself and what can I do?  Sit back and supply him with meds. Take him to physiatrist appointments and research on the net. Is that enough?  Am I truly doing all I can to help him? Such a bright man I cant fail him. So many years ahead of him. So much on his to do list. For himself and for the world.