Korlym (generic: mifepristone) is a prescription medication used to treat high blood sugar caused by high cortisol levels in the blood in adults with Cushing's syndrome and type 2 diabetes or glucose intolerance.  Korlym belongs to a group of drugs called cortisol receptor blockers, which block the actions of cortisol to lower blood sugar levels.

This medication comes in tablet form and is taken once a day, with food.

Common side effects of Korlym include nausea, fatigue, and headache.  Do not drink grapefruit juice while taking Korlym.