sitagliptin is a medication used to manage type 2 diabetes. It works by increasing the levels of incretin hormones, which help regulate blood sugar levels. By enhancing insulin secretion and reducing glucose production in the liver, sitagliptin helps lower blood sugar after meals. This drug is often prescribed alongside diet and exercise to improve glycemic control. It is typically taken once daily, either alone or in combination with other diabetes medications. Common side effects may include headaches, upper respiratory infections, and gastrointestinal issues, but it is generally well-tolerated by patients.