Diabetes is a kind of metabolic disease characterized by hyperglycemia The oral hypoglycemic agents used currently are required to take every day,which brings inconvenience to patients.Omarigliptin is a small molecule DPP-4 (depeptidyl peptidase-4) inhibitor.The drug is developed by the Merck Co,mainly for the treatment of type two diabetes.The drug only need to be taken once a week,so as to improve the patient's compliance and adherence,thereby improving the therapeutic effect.This article introduces the information of omarigliptin from the aspects of synthesis,pharmacology,pharmacokinetics,and clinical research,which provides valuable information for pharmaceutical workers.