Usually take oral hypoglycemic drugs with a maximum of three, do not recommend too many kinds of joint use. The most commonly used hypoglycemic drug for diabetic patients is metformin, if the effect is not good, other kinds of hypoglycemic drugs can be added to the combined treatment, up to three kinds of drugs can be used in combination therapy, if the effect is still poor, it is recommended to add insulin therapy. The purpose of this is to avoid overdose of one drug alone, and at the same time reduce the side effects of the drug, so that the patient’s blood glucose control is stable. If more than three oral hypoglycemic drugs are used, the side effects of the drugs are too great, which strengthens the toxicity of the drugs, which is a kind of harm to the patient’s body, and the more drugs are used, the higher the cost will be, in this case, the addition of insulin is more effective and economical for patients. Specific medications for diabetic patients are recommended to follow the doctor’s instructions.