How to treat withdrawal symptoms in a 91-year-old?

Hello doctor

My mother is 91 years old and is very healthy and bright. She has been taking 5 mg of Nitrazepam for years at night to help her sleep. I do not know why but her doctor has changed it to Zolpidem 5 mg. This was a week ago. Over the last few days, she started to display what I recognized could be withdrawal symptoms. I am on Zomorph and recognized diarrhea, nausea, and flu-like symptoms could be withdrawal as I have been there myself. I have been looking online to see whether we can switch Nitrazepam for Floridem to correct the dosage. The whole thing concerns me as I am reading about increased falls and broken bones etc. As far as I can see a switch from 5 mg of Nitrazepam should be to 10 mg of Zolpidem. They do not seem to be an equal swap though and I wonder if she has withdrawal symptoms due to it. As I say she is 91 years old and it is not fair that she is having to go through this. It is pretty severe for her. Could you give me some information on switching from Nitrazepam to Zolpidem, please? How it should be done or should it be done? What dosages should be given especially for elderly people?

Hello doctor,

There was no reason to change the Nitrazepam. She has been on it for decades. Is there a shortage of this medication? In terms of withdrawal will she go through withdrawal regardless of the dose of Zolpidem as Nitrazepam and Zolpidem affect different receptors? To get her out of the mess should she increase the dosage of Zolpidem? Would that help? Obviously, we will have to talk to her doctors before we do anything but I live a long way from my mother and she is deaf and cannot talk on the phone. When I talk to them I want to have an idea of what I am talking about.