Valtrex to prevent herpesIt's important to remember . . . I took Valtrex . . . . If someone is exposed to a partner . Daily use of the genital herpes treatment Valtrex can prevent the spread of the virus to a partner. Food and Drug Administration (FDA) approved the use of Valtrex to prevent transmission of herpes to an uninfected partner. VALTREX may not prevent all recurrences. . . VALTREX may not prevent all recurrences. one, you may want to consider talking with your Doctor about daily Valt... more