click here for details           Famvir  (U.S.N.L.M.)
Dosing/ Herpes Zoster Promptly dose 500mg po tid for 7 days
Dosing/ Herpes Simplex Promptly dose 250mg po tid for 7 days
Chem Specs famciclovir
Quantities 125, 250, 500mg tablets
Cost 41.00/30tab/500mg  (generic)
Class guanine analogue antiviral
Action Famciclovir is a prodrug of penciclovir which is absorbed poorly when
given orally. Activated form inhibits viral DNA polymerase, impairing
virus replication within the cell.
Activity Penciclovir is active against herpes viruses (In decreasing order
of potency): HSV-1, HSV-2 and VZV.
Usage Indicated for acute herpes zoster and herpes simplex infections.
Use oral treatment when topical toxicity is encountered.
Initiate treatment within 6 hrs of symptom onset if possible.
Contraindications Hypersensitivity to the product's components, and Denavir (penciclovir cream).
Pediatric use Safety and efficacy have not been established.
Pregnancy Category B
Steroids are indicated with stromal involvement,
maintaining antiviral coverage if the epithelium is compromised.
(Two thirds of early Acanthamoeba keratitis are misdiagnosed as HSV.)