A week and a half clean, is just a drop in the bucket. An addict's mind is forever altered, and he will always be an addict, it's just a matter of whether he is active or not.
I assume he is an adult, so he should be on his own, taking care of himself and not living at home.
The only thing I can say is: Hands off the addict. Let him be allowed to find his own way, it is his problem, and, his responsibility to resolve it.