The time that blood glucose can be lowered is closely related to the degree of elevation of blood glucose, one’s own pancreatic islet function, the applied glucose-lowering program, and the patient’s self-management, so there is no specific how long it will take to lower the blood glucose 7.5 mmol/L. Blood glucose is generally categorized into fasting blood glucose and 2-hour postprandial blood glucose. The normal value of fasting blood glucose is 3.9-6.1mmol/L, and the standard of fasting blood glucose control for diabetic patients is ≤7mmol/L. Fasting blood glucose of 7.5mmol/L requires a combination of medication, diet, and exercise, and the medication includes metformin and gliquidone, which need to be taken under the supervision of a physician. The normal value of 2-hour postprandial blood glucose is <7.8mmol/L, and the goal of 2-hour postprandial blood glucose control for diabetic patients is ≤10mmol/L. 2-hour postprandial blood glucose of 7.5mmol/L belongs to the normal level, and the current treatment can be continued. Blood glucose 7.5mmol / L should go to the hospital, under the guidance of the doctor for appropriate examination and treatment.