Budesonide, (RS) -11β, 16α, 17, 2-tetrahydroxy pregna-1,4-diene, 3,20-cyclic dione 16,17-acetal butyraldehyde, is a high potency non-halogenated glucocorticoid with weak mineralocorticoid effects. Budesonide has an intrinsic potency approximately 200 times greater than that of cortisol and 15 times greater than prednisolone.