Hi Debbie, Sorry you are having to deal with Colitis and IBD along with the PMR. That has to make it even more difficult to manage the symptoms while tapering dosages. Have you looked at any anti-inflammatory diets for IBD? Just wondering if it might give you more choices on what to try. Here's some information that might be helpful if you haven't already seen it.

-- Anti-Inflammatory Diet for IBD: https://www.nutritionaltherapyforibd.org/dietary-options/anti-inflammatory-diet-for-ibd

As a registered dietitian, I have been learning a lot about how our gut microbiome affects our overall health and it seems to be tied to most chronic diseases, as well as autoimmune diseases. I found this link from Stanford that might be of some help to you: https://stanfordhealthcare.org/medical-clinics/inflammatory-bowel-disease-ibd-program.html?s_kwcid=AL!18384!3!703944178929!p!!g!!inflammatory%20bowel%20disease%20treatment&cid=mcc-clinics|srch|google&gad_source=1&gclid=CjwKCAiAm-67BhBlEiwAEVftNqjpGSOZc7wOVbgS52XcLdtjA9D42zSUMFnp8RW7nhiOpY5l8CfUXhoCwd4QAvD_BwE#treatments
PS I have also heard of some remarkable recoveries using fecal transplants from a person with a healthy gut. This is common practice for c-Diff. I know it sound disgusting, but it is being used more and more in our medical community and has some sound research behind it. Because of our low-fiber, highly processed food diet in America, coupled with our overuse of antibiotics, our gut flora is often in a state of dysbiosis and needs balancing again.