In answer to your questions:
We've been to numerous doctors since he was about six years old. He had extensive testing at a hospital when he was 14. Results were ODD, ADHD, depression, possible bi-polar. About eighteen months ago, we had him tested again at the request of psychiatrist and psychologist. At that time he was on Effexor, Depakote, and Strattera. Results were similar although no bi-polar. The last time he was tested was about six weeks ago. It was not done in a hospital, but the testing was extensive. It totalled about seven hours, including interviews with us, my difficult child, reviewing all records, many, many tests for him to take. The results were ADHD, ODD, and possibly the beginning of CD (because of his age?) although he is not violent with people, animals, etc.
He is in therapy and has been for about 4 years. We changed therapists about two years ago. We are also in family therapy.
He has been on Strattera for about three years. Previously, he was on Adderall, but they changed his medication when he was tested at 14. I do think it helps him with his concentration, etc. He agrees. He has been off of Depakote and Effexor for about three months. I have not noticed a huge difference - if anything he may be better. He was not good about taking his medication consistently. It was always an argument. I was worried about his depression, but he seems to be doing well. With the last round of testing, it did not show clinical depression. They thought it may be more situational depression due to probation, etc.
Regarding school, he used to get all A's and B's until about 9th grade. Then he started going downhill slowly. He's very intelligent and can get straight A's if he wants to. He will try if he likes the class. If not, he will not do his homework or study. He is happy to just "get by". He can be flunking a class, then get an "A" on the final to get a passing grade for the quarter (very frustrating). He gets along OK with peers. He has some friends, but mostly acquaintances, not close friends. He has a job that he has had for two years. He's a hard worker and reliable while at work.
No drugs or alcohol that we know of. All of his UA's have come back clean. I hope that helps!