Random cortisol test

[Heidi_SF]

Hello all-

My new GI doc has ordered a few blood tests, including a "random cortisol" test. I don't recall him giving me any special instructions. I'm wondering if this particular test should be early morning before first pred dose?

Thanks

[DorsetLady PMRGCAuk volunteer]

Test should be done first thing in morning - and usual advice is no Pred for previous 24 hours.

[SnazzyD]

You withhold your morning Pred until after the test which should ideally be done between 8am and 9am but by 10am, or within 3 hours after waking.

[AtopicGuy]

About 99% of prednisone leaves the blood within 24 hours, so don't take your next daily dose until after the blood has been drawn.