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A member asked:

Had the blood drawn at 10:00 am for my cortisol am blood test. is that too late in the day to get an accurate test result? just read 7-9am.

A doctor has provided 1 answer

Cortisol test: Cortisol has a circadian rhythm normally. A 10 am draw will be meaningful. It is a screening test. If less than 5, more testing needed.

Answered 8/31/2014

3.8k views

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Related Questions

A member asked:

Expected high cortisol results since bipolar, told 3/13 saliva test (1.94 mcg/dl, 11pm) unreliable. 6/13 labs = 8am blood 5.9, dexameth. Supp. (1mg) 0.8, 24 hr free urine 7.1. Why low now if bipolar?

8 doctors weighed in across 2 answers

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I recently got a cortisol blood test. I always get really stressed out during the blood draw. Would this affect the cortisol levels?

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Primary physician has ordered an AM Cortisol Blood Test. Could the medications Androgel or Guanfacine have any effect on the test results?

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Doctor has asked me to repeat cortisol blood test at 9am as my last test was 162. Is this low or high cortisol? Thank you.

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A member asked:

I have had ongoing issues for 4 1/2 months..I had my blood drawn in the morning and my cortisol registered <1.0..Dizzyness..Vertigo ruled out.?

A doctor has provided 1 answer

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I had a dexamethsone supression test done where i took the tablet at 8pm and had blood drawn at 8am next morning. My results were 0.9 for my cortisol ?
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