I apologize in advance for asking this question because I'm sure it's been asked loads of times before, but I simply cannot find answers via searching.
I was at 3.5 mg PRED/day, having tapered from 60 mg about 28 months ago from a confirmed GCA diagnosis. I was feeling exhausted, sweaty, wanting to sleep very often and asked my Rheumy if he could order some kind of adrenal insufficiency test. He responeded positively, and ordered a "Cortisol Test." Results were 5.9 ug/dL -- at the lower end of "acceptable," which seems to be anywhere between 5 and 25 ug/dL.
He had his nurse call me to tell me to continue decreasing my prednisone dosage since the results were in acceptable limits.
Here's my question: was that an adequate test, or is there some other test that ought to have been done to assure the adrenals are performing properly?
Thanks so much, and sorry if this has been covered before.