Atazanavir is an antiviral medication used primarily to treat HIV infection. It belongs to a class of drugs known as protease inhibitors, which work by blocking the virus's ability to replicate in the body. Atazanavir is often prescribed in combination with other antiretroviral medications to enhance its effectiveness and improve patient outcomes. This medication is typically taken once daily, with or without food, and is available in capsule and tablet forms. Common side effects may include jaundice, abdominal pain, and nausea. Regular monitoring by a healthcare provider is essential to manage any potential interactions with other medications and to ensure optimal treatment.