In general, clinically 3-4 g of glucose needs to be antagonized by adding 1 unit of insulin. Therefore, the addition of 3-4 units of insulin to 10g of glucose can completely antagonize the blood sugar raising effect of glucose infusion. Glucose plus insulin infusion is very common in clinical practice, mainly in diabetic patients who cannot eat and need to be given sugar saline or sugar to enhance nutritional support. Sugar infusion alone can cause a rise in blood sugar, so a certain amount of insulin is usually added to the fluid to antagonize the blood sugar-raising effect of sugar. After the infusion of sugar and insulin, the blood glucose of diabetic patients generally does not produce large fluctuations.