Plasma-substituting agent. Has a detoxifying and rehydrating effect. It replenishes the deficiency of Na + at various pathological conditions. 0.9% NaCl solution is isotonic with human plasma and is therefore rapidly eliminated from the vasculature, only temporarily increasing the BCC (effectiveness with blood loss and shock is insufficient). Hypertensive solutions Sodium chloride (3-5-10%) with external application contribute to the release of pus, show antimicrobial activity, with intravenous administration intensify diuresis and fill the deficiency of Na + and Cl-.