FENIVIR CREAM 1% TUB x 2 G

Fenivir contains penciclovir and belongs to a group of medicines called antivirals that stop the multiplication of viruses, such as the one that causes cold soresenciclovir has been shown to be active in vivo and in vitro against herpes simplex viruses (types 1 and 2) and varicella zoster virus. Penciclovir acts on virus-infected cells where it is rapidly and efficiently converted to triphosphate (by viral thymidine kinase). Penciclovir triphosphate persists in infected cells for more than 12 hours, where it inhibits viral DNA replication, and has a half-life of 9, 10, and 20 hours in cells infected with varicella zoster virus, herpes simplex virus type 1, and herpes simplex virus type 1. 2, respectively. In uninfected cells treated with penciclovir concentrations of penciclovir triphosphate are only poorly detectable. Consequently, uninfected cells are unlikely to be affected by therapeutic concentrations of penciclovir.