Prednisolone is a synthetic analogue of the adrenal cortex secreted by the hormones cortisone and hydrocortisone. Unlike cortisone and hydrocortisone, prednisolone does not cause a noticeable delay in sodium and water, and only slightly increases the release of potassium. The drug has a pronounced anti-inflammatory, antiallergic, anti exudative, anti-shock, antitoxic effect.