Prednisolone is a dehydrated analogue of hydrocortisone. It has anti-inflammatory, antiallergic, desensitizing, antishock and immunosuppressive effects. When using prednisolone, the effects of the drug are realized through the stabilization of cell membranes, inhibition of macrophage accumulation, reduction of leukocyte migration, reduction of capillary permeability, which prevents the formation of edema. Prednisolone inhibits phagocytosis, affects the metabolism of arachidonic acid, as well as the synthesis and release of inflammatory mediators. The immunosuppressive effect of prednisolone is due to the inhibition of the activity of T- and B-lymphocytes, a decrease in the content of complement in the blood, as well as inhibition of the production and effects of interleukin-2. It has a catabolic effect, increases the level of glucose in the blood. It exhibits some mineralocorticoid activity, increases the reabsorption of Na+ and water in the renal tubules, increases the excretion of K+ and Ca+, especially when their levels in the blood plasma are elevated. Prednisolone inhibits the synthesis and secretion of adrenocorticotropic hormones by the pituitary gland and secondarily - glucocorticosteroids by the adrenal glands.