My Opinion: I didn't mention Ned Hallowell because I don't care for his advice (or agree with him). His experience (and advice) is not a universal gold standard, and I don't agree that he is considered "the preeminent expert." That may be your opinion, Alex Mack, but it isn't everyone's. We can agree to disagree without being disagreeable!

Important for people reading this thread to know that there are other opinions besides his, and other options.
The pharmacology of medication for ADD and ADHD is complex. For me, Adderall exacerbated the irritability and anxiety, and I couldn't sleep. My type of ADHD did not respond well to that medication. Very low dose of time-release methylphenidate (Concerta) is most effective for me, with few side effects. Exercise is invaluable! So is meditation. It is possible to quiet the "monkey mind". If I can do it, anyone can do it.
I suggest finding a trained psychiatrist who has an extensive background in biochemistry and is willing to work with you in managing your symptoms and maximizing your potential for success. I am able to focus without losing my personality, which was the paramount goal for me and my doctor. I like myself a lot better ON Concerta than OFF it!