Adrenocorticotropic Hormone (ACTH)
Endo Test - Lavender Top Tube - Overnight Fasting Required
ACTH is a study of the anterior pituitary gland function, part of a complex feedback mechanism for cortisol production.
ACTH levels exhibit diurnal variations, with the highest levels being from 4AM to 8AM and lowest being at 9PM (with normal sleep patterns). This variation is lost when the pituitary gland and adrenal gland is affected by neoplasm.
Patients with any of the following conditions can be found to have elevated levels of ACTH: Primary Adrenal Insufficiency, Cushing's Disease, Stress, Adrenogenital Syndrome.
Patients with any of the following conditions can be found to have decreased levels of ACTH: Secondary Adrenal Insufficiency, Cushing's Disease, Hypopituitarism.
Interfering drugs include: Estrogens, Insulin, Ethanol, Vasopressin.















