Tamiflu as a preventive. . . Learn about Tamiflu, a popular antiviral medication used to prevent and treat seasonal influenza and H1N1 (swine) flu. Can you take Tamiflu as a preventive measure? This is a popular question that everybody is asking the world as of now. FDA approves preventive Tamiflu for children. For those of the lesser informed a word about . . . . 9/8/2009 · The medicines Tamiflu and Relenza should only be used to treat people who are sick with swine flu and at high risk... more