The Dexamentasone Suppression Test (DST), also referred to as the "low dose DST" or "overnight DST", is a screening test for Cushing's Syndrome.

• The requesting clinician should give the patient a 1mg dexamethasone tablet with instructions to take it at 11 pm. (for outpatients: the tablet should only be taken Sunday to Thursday evening, to ensure collection next day.)
• The patient must present to the collection centre the following morning ( preferably before 10am ) and have a serum sample taken for cortisol analysis.

If there is any doubt do not send the patient away without documented consultation with a senior scientist. ( 9895 3548)

Endocrine consultation is suggested for "High Dose DST".