In the US corticotropin is used to treat epileptic spasms in infants, acute exacerbations of multiple sclerosis in adults; acute episodes of psoriatic arthritis and rheumatoid arthritis and ankylosing spondylitis; in acute exacerbations or as maintenance therapy for the collagen disorders like systemic lupus erythematosus and systemic dermatomyositis; for skin conditions like severe erythema multiforme and Stevens-Johnson syndrome; for serum sickness; for severe acute and chronic allergic and inflammatory processes involving the eye such as keratitis, iritis, iridocyclitis, diffuse posterior uveitis, choroiditis, optic neuritis, chorioretinitis, and anterior segment inflammation; sarcoidosis in the lungs; and to treat edema in certain nephrotic syndromes.