Generally, liraglutide injection is used once a day, starting with a low dose at first, and the dose can be gradually increased after 1 week. Liraglutide injection is a synthetic peptide substance that can mimic the physiological effect of human glucagon-like peptide-1, so as to achieve the effect of lowering blood sugar. It is mainly used for controlling blood sugar in type 2 diabetes patients, and can be combined with metformin or sulfonylurea drugs, and the main usage is subcutaneous injection once a day, starting from low dose under the guidance of doctor. In addition, liraglutide can improve the utilization of insulin, which can lead to weight loss and slimming. Therefore, liraglutide is more suitable for obese patients who have type 2 diabetes, and can lose weight while treating diabetes. In addition, it should be noted that liraglutide should not be used in patients with type 1 diabetes or diabetic ketoacidosis, and patients should avoid foods with high sugar content during the medication.