Biochem/physiol Actions
Metyrapone is a glucocorticoid synthesis inhibitor; a standard in assessing adrenal gland function especially in response to stress, as well as pituitary gland function. In addition to acting as a glucocorticoid synthesis inhibitor, Metyrapone also inhibits cytochrome P450-mediated prostaglandin ω/ω-1 hydroxylase activity and impairs learning and memory. Data shows results in activation of the sleep EEG and a robust decrease in quantitative delta sleep.