Prednisone is an oral, synthetic (man-made) corticosteroid used for suppressing the immune system as well as inflammation. It has effects similar to other corticosteroids such as triamcinolone (Kenacort), methylprednisolone (Medrol), prednisolone (Prelone) as well as dexamethasone (Decadron). These synthetic corticosteroids mimic the action of cortisol (hydrocortisone), the naturally-occurring corticosteroid produced in the body by the adrenal glands. Corticosteroids possess many effects on the body, but they most often are used for their potent anti-inflammatory effects, particularly in those conditions in which the immune system plays an substantial role. Such conditions include arthritis, colitis, asthma, bronchitis, confident skin rashes, as well as allergic or inflammatory conditions of the nose as well as eyes. Prednisone is inactive in the body as well as, in order to be effective, earliest must be converted to prednisolone by enzymes in the liver.