Gemigliptin is primarily used in the treatment of type 2 diabetes mellitus. It functions as a dipeptidyl peptidase-4 (DPP-4) inhibitor, which helps regulate blood sugar levels by increasing the release of insulin and decreasing the production of glucagon. This makes it effective in managing hyperglycemia in diabetic patients. It is often prescribed as part of a comprehensive treatment plan that includes diet and exercise. Additionally, gemigliptin is known for its favorable safety profile and is sometimes preferred for patients who may not tolerate other antidiabetic medications well. It can be used alone or in combination with other antidiabetic drugs like metformin to achieve better glycemic control.