Tamiflu is an antiviral medicine to treat infection caused by influenza virus. Tamiflu does not prevent you from getting the flu. These medications attack the influenza virus and prevent it from spreading inside your body. Tamiflu is used to treat seasonal or annual flu viruses. Studies suggest that Tamiflu could work in preventing and treating avian flu infection in humans.

Name under which oseltamivir is marketed in Canada and the USA (see Oseltamivir).