ACTH Stimulation Test
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The adrenocorticotropic hormone (ACTH) stimulation test is used to measure how well your adrenal glands are working.
This test checks the levels of cortisol in your blood before and after your adrenal glands are stimulated with ACTH. ACTH is produced by a gland in your brain called the pituitary gland. ACTH stimulates your two adrenal glands, which are located above each kidney.
The adrenal glands produce hormones that are released into the blood. One of these hormones is cortisol. Cortisol helps your body to respond to stress. If your adrenal glands are not working well and are not responding to ACTH properly, the test result will show too little cortisol.
Two or more blood samples are required for this test. The samples are usually collected by inserting a needle into a blood vessel.
Other tests may be needed to find the cause of adrenal gland conditions and confirm a diagnosis.
Talk with your health care provider about what your results mean.
This information is not intended to replace advice given to you by your health care provider. Make sure you discuss any questions you have with your health care provider.
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