There are specific programmes aimed at professionals who have substance misuse issues. Talbott in Atlanta was always the famous one that specialized in doctors/medical professionals/pilots, etc.
People who worked in those programmes invariably took the view that doctors, lawyers, etc. tended to me much harder to treat than the average joe because they were much better at justifying and rationalizing why their drinking/drug use wasn't a problem.
Consequently, they tended to have much more rigorous programmes than you get for the average crackhead. Much stricter, much more intensive, etc.
Stanton Peele has made the argument that Talbott's programmes have a ridiculously high rate of suicide among patients and he attributes this to the 'take no prisoners' approach they had towards addiction treatment. (Talbott devised the AMA's programme for addicted physicians, so if you were a doctor with a habit, chances were, if you could afford it, you'd go to the gold standard. I think they went because they were better than regular rehabs at helping doctors get their licence back.)
Anyway, I think Nick needs to go to Talbott for treatment. He wouldn't be able to pull the wool over there eyes, and the chances of him necking himself when he failed would be hugely increased.