1. ZEPDON 400 MG (RALTEGRAVIR) is an antiviral medication used to treat HIV infections.2. It works by blocking the action of an enzyme called integrase, which is needed for HIV to replicate in the body.3. ZEPDON 400 MG (RALTEGRAVIR) should be taken in combination with other antiretroviral drugs to treat HIV infections.4. This medication is available in tablet form and should be taken as directed by your doctor.5. ZEPDON 400 MG (RALTEGRAVIR) is now available for purchase from our online medicine store in the USA.