The role of oseltamivir capsules, it is a specific inhibitor acting on neuraminidase, and its inhibition of neuraminidase inhibits the mature influenza virus from detaching from the host cells, thus inhibiting the spread of influenza viruses in the body in order to play a role in the treatment of influenza. Oseltamivir is used for the treatment of influenza A and B in adults and adolescents 1 year of age or older, when patients are administered within 48 hours of the first onset of symptoms, and, to a lesser extent, for the prophylaxis of influenza A and B in adults and adolescents 13 years of age or older. The usual specification is at 75mg.