Hi Mizzuno;
What about if you just give a heads up to the doctor so they just don't renew her prescription? You can tell him the situation and that you don't want him to share the info that you called.
It will be obvious since she will be out by tomorrow.
Also, you could just let her run out--they shouldn't renew them anyway that fast.
It seems that unless they are grossly negligent (which can happen, I know) she shouldn't be able to access an endless supply whether you tell them or not.
Am I missing something?
Sorry you are going through this. Your family is a lot like mine I think. Hang in there.