Famciclovir Home>Pharmacy>Drugs_and_Medications>F>Famciclovir     Web Pages Famciclovir a.k.a. Famvir. Famciclovir Used to treat shingles (herpes zoster) as well as herpes simplex virus infections. (Famvir) DrugDigest: Famciclovir ( Famvir ) Information on dosage, usage, side effects, interactions, and drug comparisons, including generics when available. Famvir Full prescribing information from RxList.