<prompt> Oseltamivir dose is -75 mg BD x 5 days orally75mg BD x 5 days i.v.200 mg BD x 5 days orally200 mg BD x 5 days i.v.  <response>: Ans. is a i.e. 75 mg BD x 5 days orallyRifampcino Oseltamivir and Zanamivir act as neuraminidase inhibitors and prevent the virion release by causing clumping of mature virions. These drugs are effective against both Influenza A and Influenza B.o Oseltamivir is drug of choice for bird flu H5N1 as well as swine flu H1N1.Routes of administration:o Oseltamivir - Orally SE - Nausea and vomitingo Zanamivir - Inhalation SE - Bronchospasmo Peramivir - Intravenous LV. form of Zanamivir 