Adrenocorticotropic Hormone

ACTH (Adrenocorticotropic Hormone) Test

Why It Is Done

A test to measure ACTH is done to check for:

  • A problem with the adrenal glands or pituitary gland. A high level of ACTH and a low level of cortisol (or low ACTH and high cortisol levels) could be caused by a problem with the adrenal glands. Low levels of ACTH and cortisol could be caused by a problem with the pituitary gland.
  • Overproduction of ACTH. This may be caused by an overactive pituitary gland. In response, the adrenal glands release too much cortisol (one form of Cushing's syndrome).

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Author: Bets Davis, MFA Last Updated: June 26, 2008
Medical Review: Caroline S. Rhoads, MD - Internal Medicine
David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism

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Topic Contents
 Test Overview
Arrow PointerWhy It Is Done
 How To Prepare
 How It Is Done
 How It Feels
 Risks
 Results
 What Affects the Test
 What To Think About
 References
 Credits