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ACTH Stimulation Test Patient Instructions


• You will be given a prescription for cosyntropin. This will need to be filled prior to the day of your testing appointment.

• Do not eat for 12 hours prior to the test. You may have water.

• Do not take any steroids (hydrocortisone, prednisone, dexamethasone) for at least 12 hours prior to the test (please let your doctor know if you are taking a steroid).

• On the day of the test, you will be given an IV dose of cosyntropin (ACTH).

• Your blood levels of adrenal hormones will then be measured after 30 and 60 minutes to monitor your adrenal glands’ response to ACTH.

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Main Campus

10837 Katy Freeway, Suite 200
Houston, TX 77079
Ph: 713-468-2122
Fax: 713-468-2289


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Greater Heights Campus

1631 N. Loop West Ste. 625
Houston, TX 77008
Ph: 832-649-4370
Fax: 832-218-7402


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Methodist West Campus

18300 Katy Freeway Suite 465
Houston, TX 77094
Ph: 713-973-3470
Fax: 844-873-0032