drugs are going to be hard to kick unless he WANTS to kick them - and you have my prayers...just be there for him and all the best to you. If they're calling you in the middle of the night - taking your phone off the hook is probably the best thing to do - anything he can discuss with you
that's important can be done during the DAY when everyone is awake.
Poor thing - what a burden for you to carry -
I just want to send you a hug & all the best to your son.