Instavir – Dolutegravir 50mg Tablet is an antiretroviral medication used in the treatment of HIV (Human Immunodeficiency Virus) infection. It belongs to a class of medicines known as integrase strand transfer inhibitors (INSTIs). Dolutegravir works by blocking the integrase enzyme, which the virus needs to multiply and spread in the body. It is commonly prescribed as part of combination antiretroviral therapy (ART) to help control HIV infection and improve immune function.