Famciclovir (INN) (IPA: ) is a guanine analogue antiviral drug used for the treatment of various herpesvirus infections, most commonly for herpes zoster (shingles). It is a prodrug form of penciclovir with improved oral bioavailability. Famciclovir is marketed under the trade name Famvir (Novartis).

DrugDigest: Famciclovir ( Famvir ) - Information on dosage, usage, side effects, interactions, and drug comparisons, including generics when available.
Famciclovir - Fact sheet for HIV and AIDS patients.
Famciclovir - Used to treat shingles (herpes zoster) as well as herpes simplex virus infections. (Famvir)
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