What kind of drug treatment should he be in?

I am watching intervention and thought that I should call or write them about my nephew. However, I am not sure if it will work because it seems that the people on this show are extreme drug addicts. My nephew, however, is 21, in college, has a job, but abuses drugs and alcohol. I’ve talked to his family as well as him, and he has done just about everything. He has been using drugs and alcohol regularly since he was 15. He doesn’t steal or anything to get drugs and he seems that he has a good head on his shoulders. However, I feel that he’s been doing too many drugs for too long. He seems to point fingers too (he’s had a hard life) and blames his mistakes on others.
The worst part is, his blame game seems justifiable so I don’t know how an intervention would help if the people that he’s blaming is asking him to stop using drugs. Any ideas?

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