Glycerol fructose injection is a compound preparation, the main ingredients have glycerol, fructose, sodium chloride, according to the pharmacological effects of the following types of effects: 1, hypertonic dehydration drugs, osmolality and 20% mannitol injection is the same kind, glycerol fructose injection, glycerol involved in brain metabolic process to improve brain metabolism, fructose to do energy support, sodium chloride to regulate electrolyte balance, such as the application of 20% mannitol injection can appear Hyponatremia, glycerol fructose injection has sodium chloride, that is, to reduce the risk of hyponatremia; 2, dehydration, more use of its hypertonicity for dehydration, such as lowering intracranial pressure, lowering intraocular pressure, can be used for those with elevated intracranial pressure, glaucoma. Because it can be dehydrated, it can reduce brain volume during neurosurgery and facilitate surgical operations. Its mechanism of action is to dilute blood, reduce peripapillary edema, improve microcirculation, and in this case, it can increase blood supply and oxygen supply to the ischemic site; 3. Improve microcirculation, because it contains fructose can be a high-energy infusion, which can generate heat in the body to increase oxygen consumption of brain tissue, promote brain metabolism, and enhance cell vitality; in short, glycerol fructose injection is mainly a dehydrating drug, and it is mainly used for patients with elevated intracranial pressure and elevated intraocular pressure.