It think it's the dexamethasone suppression test.
Some useful information here :
http://www.labtestsonline.org/understanding/analytes/cortisol/test.html
Cheers,
Mark
Dear setii,
As i said i'm a simple diabetic and don't have a medical degree. But cortisol is a hormone released by the adrenal glands and in diabetics can cause blood sugar levels to increase. But i don't know what test can be done to discover or cure this situation. Ask your doctor, he may have advice. Good luck, bret