The biologic that worked for me was Actemra. Unfortunately, Actemra isn't FDA approved for the treatment of PMR. However, it is approved for the treatment of GCA and a few other autoimmune disorders including RA. I don't have GCA but I have another type inflammatory arthritis along with PMR. My rheumatologist thought Actemra might work for my case of chronic PMR and inflammatory arthritis. He just thought if Actemra works for GCA and RA then it might work for PMR and my type of inflammatory arthritis..
I'm glad my rheumatologist went to the trouble of submitting a special request to get Actemra approved for me. The request was approved.

There were other factors that were considered when the approval request was submitted. Long term prednisone use was one factor. The failure of all other treatment options like methotrexate was another factor.