Obviously Eejj you have never had a drug problem or know anyone that has. God forbid that either ever happen. You should have a heart and think before you spout off like that.
Firstly Area206 there is really nothing more that you can do . It sounds like you have done more than you share. Secondly he will probably hit bottom and perhaps go to jail before he quits, if he quits. But he has to want to quit before he can. And usually (not always), but usually it takes something drastic to make a person realize that they have a problem. Once reality hits them in the face there are different steps that they will take or be forced to take from there.
Addiction is a very sad thing and many people are addicted to something or another. Nonetheless people start using for one reason or another. Who are we to judge anyone not knowing any of the circumstances or even if we did.