Updated Diagnostic Cortisol Values for Adrenal Insufficiency

In this test, Cosyntropin is administered as an intramuscular injection into the arm. Cortisol levels are measured before and after injection. Cosyntropin tests are routine medical tests that are done in doctors' offices to diagnose adrenal insufficiency. Cosyntropin is a synthetic version of a hormone, called ACTH, that is secreted by our bodies to help produce cortisol.