To understand whether elevated cortisol levels are a normal reaction or an abnormal increase, Dr. Hatipoglu may then want to do testing such as a milligram dexamethasone suppression test (which ...

after the administration of 0.5 mg dexamethasone at 6 h intervals for 48 h. For the LDDST–CRH test, Cushing's syndrome is excluded if patients' serum cortisol levels are suppressed to <38 nmol/l ...

Dexamethasone provided 4 mg at every 6 hours, the usual initial dose—equivalent to 400 mg of cortisol per day—is ... the rapid ACTH stimulation test may also be utilized.

Abbreviations: LDDST = low dose dexamethasone suppression test; LH = luteinizing hormone; PCOS = polycystic ovarian syndrome; UFC = urinary free cortisol. Clinical features initially attributed to ...