Amitriptylene + Hydrocodone - Safe?

My wife suffers chronic pain due to spinal stenosis. Since treatment is far off, the doctor has prescribed amitriptyline + hydrocodone to help with the symptoms which are intense. To me, this seems like prescribing twice for the same symptoms since, to my understanding, they both function as analgesics. Furthermore, from what I see online, the combination seems to verge on the dangerous side. As if all this weren't enough, we are now in the morning after she has taken 10 mg of the ami and she is almost comatose from the one drug alone so yes, I am very apprehensive about her taking the 2 together. Has anyone gone through this particular double dose regime?