My 15-year old son has ADHD. He is smart, talented, athletic, and so many other great things, but he certainly has been difficult at times. Several months ago, a "friend" got him to try marijuana; since then, it seems like he is addicted to it. No matter the consequences, he seeks it. He has lied and even gotten in trouble with school. Is this common with those who have ADHD? Any suggestions to help him sustain from smoking pot? It is hurting him in soooo many ways.