Metyrapone is used for the medical control of hypercortisolism in Cushing's syndrome (ACTH dependent or independent). The aim for medical treatment is to achieve pre-operative control of hypercortisolism, or for control of residual disease persisting post-operatively (TSS, adrenalectomy). It is not for long term definitive treatment/cure, only as an adjunct (surgery is the aim for cure in most causes of Cushing's syndrome). Metyrapone hence acts by inhibiting adrenal steroidogenesis. One side effect is hirsutism (in women) because of the excess androgen precursors created. The other commonly used agent for medical treatment of Cushing's is ketoconazole (an anti-fungal agent). This does not exhibit the side effect of hirsutism.
In rare individuals, destruction of large joints (aseptic necrosis) can occur while undergoing treatment with hydrocortisone or other corticosteroids. These patients experience severe pain in the joints involved, and can require joint replacements. The reason behind such destruction is not clear. Quick Guide Rheumatoid Arthritis (RA) Symptoms & Treatment From Tips to Better Manage Your Migraine Start Now What is the dosage for hydrocortisone acetate-injection?