Bictegravir is an antiretroviral medication used to treat HIV (Human Immunodeficiency Virus). It belongs to a class of drugs known as integrase strand transfer inhibitors (INSTIs), which work by blocking the virus's ability to integrate its genetic material into the host's DNA. This helps to reduce the viral load in the body, allowing the immune system to function more effectively. Bictegravir is often combined with other medications in a single tablet regimen, making it easier for patients to adhere to their treatment plans. It is typically taken once daily and is known for its effectiveness and favorable side effect profile.