@ingekunga and @daisy12345 - I can't say that I understand all of this information but it does talk about the role of the adrenal glands while your PMR is active.

Adrenal gland hypofunction in active polymyalgia rheumatica. effect of glucocorticoid treatment on adrenal hormones and interleukin 6 - https://pubmed.ncbi.nlm.nih.gov/11950017/
Adrenal insufficiency in treated PMR: The tip of the iceberg - https://www.endocrine-abstracts.org/ea/0056/ea0056p44