PENVIR is a brand of antiviral nucleoside Famciclovir with analog Penciclovir. Penciclovir is a highly selective antiviral with a prolonged action against Herpes infection. Penvir belongs to Anti Virals therapy of KRIS Division and it is available in 2 forms: Penvir 250Mg Tablet and Penvir 500Mg Tablet.