Hestar 3% Infusion is used for short-term fluid replacement after trauma. It is used in the treatment of hypovolemia that can result due to any injury, surgery, or severely ill patients. Hestar 3% Infusion is a large weight molecular substance that remains restricted to the blood vessels and works by producing pressure in the blood which is known as oncotic pressure. This injection must be administered under the supervision of a healthcare professional. You should not get this injection if you have any known allergies to this medicine. Before taking it, inform the doctor you are suffering from any severe heart disease. Your doctor may check your blood pressure and ask you to get regular blood tests done while you are using this injection.