Test Name
DEXAMETHASONE SUPPRESSION TEST, CORTISOL (LOW DOSE, 1MG, OVERNIGHT)
Aliases
-
Abbreviations
LOW DOSE OVERNIGHT DST
Test Classification
PANEL (PACKAGES)
Department
SPECIAL CHEMISTRY
Sub Department
-
TAT Category
BUSINESS (WORKING) TIME
Estimated TAT
96
TAT Units
HOURS
Test Requirements
Draw baseline AM cortisol sample. Patient takes 1mg oral dexamethasone at 11p.m. then ADDITIONAL AM cortisol sample is drawn at 8a.m. on the following morning. Label pre- and post-dexamethasone samples clearly.
Cost is exclusive of dexamethasone (drug) cost.
Clinical Utility
Evaluation of Cushing’s syndrome.
Last Review
26th Feb 2026