Valtrex 1000mg 21 TabsActive Ingredients: ValacyclovirManufacturer: Glaxo WellcomeLicense Holder: GlaxosmithklineOrigin: SpainDrug Class: Purine nucleosidesPharmacological effect: Valtrex is an antiviral medicine. It stops the growth of viruses of different types like herpes simplex, varicella zoste..