- Drug Name: Famciclovir
- Common names: Famvir, Ezovir, Fambir, Famcino, Famcir, Fanclomax, Fanle, Microvir, Oravir, Pentavir, Penvir, Pixin and Virovir
- Drug Type: Virostatic agent
- Used For: Feline herpesvirus (FHV-1)
- Species: Humans, cats, horses
- Administered: Tablet
Famciclovir (fam-sye-clow-veer) is a prescription antiviral medication used in the treatment of feline herpesvirus, a common viral infection which produces upper respiratory infections (URI’s). The drug is not approved for use in cats by the Food and Drug Administration but is routinely prescribed extra-label.