What is the most common way to treat adrenal insufficiency?

Adrenal hormones. Adrenal hormones of two types are usually used: 1) glucorticoids such as hydrocortisone, prednisone, dexamethasone: these regulate blood pressure, glucose levels, the immune system among other things 2) mineralocorticoids such as florinef: they regulate salt balance and blood pressure.
Adrenal insufficient. The primary treatment of adrenal insufficiency is to replace the steroid that is deficient. Depending on whether it is primary or secondary adrenal insufficiency, you may get treated with Hydrocortisone (cortef) Prednisone (deltasone) Prednisolone (delta-cortef) Methylprednisolone (medrol) Dexamethasone (decadron) fludrocortisone.