I Have A Health Question In Which My Husband And

I have a health question in which my husband and I don't know where to turn. Our son had neck surgery and he was going to pain specialist who got him dependant on drugs for pain, passing them out to him without even a follow up. Of course he is addicted now, and is going to another doctor that prescribes him 60 xanax bars, 240 Oxycodone, each month. He now has seizures from the xanax and dr. has him taking the xanax and oxy both twice a day along with gabapentin three times a day. He is 35, is out of it, stays in bed most of the time, what are we suppose to do in this case. He can't function most of the time. What do you suggest we do?