Fasting blood glucose 7.5mmol / L, need to be combined with the function of the pancreas to determine whether to take medication or use insulin, specific should follow the doctor’s instructions. According to the diagnostic criteria of diabetes mellitus, fasting venous blood glucose level ≥7.0mmol/L, and have symptoms of diabetes mellitus such as polydipsia, polyphagia, polyuria, and emaciation, etc. can be diagnosed as diabetes mellitus. For fasting blood glucose 7.5mmol / L or so, need to improve the postprandial 2 hours of blood glucose, glycated hemoglobin test at the same time, but also improve the glucose tolerance test, assessment of the type of diabetes mellitus and pancreatic islet function, if it is type 1 diabetes mellitus or pancreatic islet function is poor, the need to use insulin treatment; if the pancreatic islet function is better, you can be in the diet and exercise based on the oral use of oral hypoglycemic drugs, such as metformin first, Acarbose. For fasting blood glucose 7.5mmol / L or so, must consult a doctor in time, follow the doctor’s instructions for examination and treatment, the specific medication should follow the doctor’s instructions.