**Sitagliptin: Product Overview**  

**Definition:**  

Sitagliptin is an oral antihyperglycemic agent and a selective dipeptidyl peptidase-4 (DPP-4) inhibitor. It is widely used in the management of type 2 diabetes mellitus.  

**Function:**  

Sitagliptin works by inhibiting the DPP-4 enzyme, which increases the levels of incretin hormones (GLP-1 and GIP). This stimulates insulin release and reduces glucagon secretion, helping to regulate blood sugar levels effectively.  

**Applications:**  

1. **Type 2 Diabetes Treatment:** Used as a monotherapy or in combination with other antidiabetic medications to improve glycemic control.  

2. **Chronic Disease Management:** Supports long-term diabetes management with a low risk of hypoglycemia.  

3. **Pharmaceutical Formulations:** A key active ingredient in diabetes medications, available in tablet form.