Hello @cgm, I don't have any experience to share with CBN but I do know that my second time around with PMR was easier for me because I had made some lifestyle changes to help with inflammation and hopefully prevent future PMR flare ups. While you wait for others with experience to respond, here is some research on the CBN for inflammation:

--- Anti-Inflammatory Effects of Minor Cannabinoids CBC, THCV, and CBN in Human Macrophages: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10534668/

If you haven't already looked into lifestyle changes that can help, the Arthritis-Health site has some helpful information here:
"In such cases, avoiding dairy foods, consuming dairy sparingly, or opting for low-fat dairy products may help you avoid triggering inflammation. Boost your body's own steroid production and regulation. Natural steroids can help fight inflammation, control the body's metabolism, and also promote good sleep."
--- Diet and Supplements for Polymyalgia Rheumatica (PMR): https://www.arthritis-health.com/blog/diet-and-supplements-polymyalgia-rheumatica-pmr.