Lactic acidosis, sometimes hypernatremia, hypokalemia, headache, nausea, thirst, etc. can be produced when large amounts of glycerofructose are fed rapidly, so it must not be too fast. If the drip process is too fast, it is easy to cause tachycardia, which can lead to myocardial infarction in severe cases. If each infusion of 500mL, need to drip 2-3h, 250mL need to drip 1-1.5h. glycerol fructose is a kind of hypertonic dehydrating drug, can reduce the edema of brain tissue, can reduce cranial pressure, intraocular pressure, but also can improve the microcirculation, increase the supply of oxygen and blood in ischemic parts, it is a kind of high-energy infusion, generating heat in the body, increasing the oxygen consumption of the brain tissue, promoting the brain metabolism, and enhancing the vitality of cells.