HIV-1 integrase inhibitor 3 is primarily used in the treatment of HIV/AIDS. It works by blocking the integrase enzyme, which is crucial for the virus to integrate its genetic material into the host cell's DNA. By inhibiting this enzyme, the chemical prevents the virus from replicating and spreading throughout the body. This makes it a key component in antiretroviral therapy (ART), helping to reduce the viral load in patients and improve their immune system function. It is often used in combination with other antiretroviral drugs to enhance its effectiveness and minimize the risk of developing drug resistance. The application of this inhibitor is critical in managing HIV infection and improving the quality of life for those affected by the disease.