The only thing you can control is what you are willing to live with and at what point are his actions unacceptable to you. It all comes down to what you can live with. The only thing you can control is whether you stay or you leave.
I would put all my jewelry in a safe deposit box in the bank and make sure he doesn't have access to any of your money/bank accounts. As his addiction progresses he will most likely sell anything he can find to get drugs. Even though he has a script as he continues to take more and more he will start running out of pills before the end of the month earlier and earlier.
Please remember that you cannot make him quit, you can't rationalize with him, and you can't fix him.