If you get the flu, antiviral drugs can be used to treat flu illness. Antiviral drugs can make illness milder & shorten the time you are sick. They also can prevent serious flu complications, like pneumonia. CDC recommends antiviral drugs be used early to treat people who are very sick with the flu (ex. people who are in the hospital) & people who are sick with the flu & are at high risk of serious flu complications, either because of age or because they have a high risk medical condition.