The price of Oseltamivir phosphate granules may vary depending on the place of origin, hospital, and merchant, but the price is usually in the range of$30-60 a box. Oseltamivir phosphate granules are a neuraminidase inhibitor used for the treatment and prevention of influenza A virus. It exerts its antiviral effect primarily by inhibiting the activity of neuraminidase. This drug contains an enzyme found on the surface of the virus that prevents outgrowth from the host cell, viral replication and transmission. Early antiviral treatment with oseltamivir phosphate granules can shorten the duration of fever and disease symptoms and can reduce certain complications including pneumonia and respiratory failure. However, the use of such drugs needs to be supervised by a doctor, especially in pregnant women and young children.