ABSTRACT
Procedure 1. Withhold prednisone therapy for at least 24 hours before performing this test. If prednisone or other
corticosteroids are in use, do not do this test. 2. Obtain informed consent before performing this invasive test. 3. Insert a peripheral vein catheter for blood sampling at least 20 minutes before the CST. 4. Obtain blood samples for cortisol levels at –15 (T
–15) and –10 (T-10) before administration of cosyntropin (baseline, T0).
