Thymopentin is primarily used in immunomodulation therapy to enhance the immune system's function. It is often administered to patients with compromised immune systems, such as those undergoing chemotherapy or suffering from autoimmune diseases, to help restore immune balance. Additionally, it is utilized in the treatment of chronic viral infections, including hepatitis B and C, due to its ability to stimulate T-cell activity. Thymopentin is also applied in research settings to study immune responses and develop new therapeutic strategies for immune-related disorders. Its role in promoting immune cell proliferation and differentiation makes it valuable in both clinical and experimental contexts.