<prompt> Oseltamivir is ?Neuramindase inhibitorNeuramindase activatorCarboxylase inhibitorCarboxylase activator  <response>: Ans. is a i.e., Neuramindase inhibitor Oseltamivir and zanamivir are neuraminidase inhibitors and prevent the virion release by causing clumping of mature virions. Both these drugs are active against influenza A as well as influenza B virus. Oseltamivir is a prodrug and is used orally. Zanamivir is used intranasally - can cause bronchospasm. 