I just posted an adrenal insufficiency question on another community, but then was thinking perhaps I should have posted on my usual community as well given that virtually all of us would have taken Pred for long periods.
My GP did (at the request of one of my consultants) a 9am cortisol serum blood test. This produced results of 4 (mcg/dL) or 110 (nmol/L) - I had taken my Pred that morning at 7am as well - these results are low and indicate adrenal insufficiency. I have been referred to an endocrinologist consultant for further tests etc (currently awaiting the appointment) but in the meantime have been switched to 20mg of hydrocortisone (split 15mg in the morning and 5mg at teatime) from Pred. I have of course been strongly advised to make sure I don't forget to take the hydrocortisone, especially whilst I'm waiting for the consultant appoint.
Any comments/advise would be appreciated, but especially in regard to the low figure of the 9am test, even though I had still taken the Pred at 5mg that morning.