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About 80% of cases of Adrenal Insufficiency are caused by autoimmune disease. Other cases are caused by infection. Adrenal insufficiency occurs in slightly more women than men. In general about 1 in 100,000 individuals have adrenal insufficiency.
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Adrenal insufficiency is the deficiency of one or more hormones made by the adrenal glands. Pituitary disorders can cause low levels of of the adrenal hormone, cortisol.
Cortisol is replaced orally with tablets taken once or twice a day. The usual medications are prednisone, hydrocortisone, or dexamethasone.