dexamethasone suppression test
Definition: a test for the detection and diagnosis of Cushing syndrome; following administration of 1.0 mg of dexamethasone at 11 p.m., normal people suppress plasma cortisol to low levels; patients with Cushing syndrome do not. Higher dose regimens distinguish between Cushing syndrome due to tumor and due to hyperplasia.
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.