Hello @cjh51, Welcome to Connect. I have PMR but it has been in remission since mid 2018. I have also had both Pfizer shots and my first Shingrix vaccine with only minor side effects. Sorry to hear that your PMR may have been triggered by the vaccine and possibly Dupixent. The last time my PMR surfaced in 2016 is when I started making some lifestyle changes and eating healthier to help with the PMR as well as other stuff I had going on. I'm sure you already have seen information similar to the following but just in case...

What to eat if you have polymyalgia rheumatica: https://www.medicalnewstoday.com/articles/321683

I know the feeling of waking up and not being able to move. When did your doctor say you could start on prednisone to control the PMR?