Adrenocorticotropic Hormone (ACTH)
Adrenocorticotropic Hormone ACTH, is a test for pituitary function and is used in appraising adrenal gland dysfunction. ACTH levels show a diurnal variation, with zenith between 6 a.m. and 8 a.m. and reaching their lowest point between 6 p.m. and 11 p.m. Cortisol and ACTH levels are usually evaluated together because any change in one causes a change in the other. Fasting is not required for this test. Take all medications as prescribed.
Special Note: ACTH should be drawn between 7-10 AM