HerpX™ 180mg – Antiviral Therapy for Feline Herpesvirus (FHV-1)

HerpX™ delivers 180mg of famciclovir, the antiviral clinically proven to treat Feline Herpesvirus (FHV-1), in small coated tablets designed for consistent, easy dosing. Rather than fractioning human cold-sore tablets, HerpX™ provides a precise, pleasant alternative to antiviral support during Feline Herpesvirus (FHV-1) flares.

Purpose-Built for Feline Herpesvirus (FHV-1)

Each HerpX™ tablet contains 180 mg of famciclovir, sized for practical weight-based dosing in cats. Famciclovir is a prodrug of penciclovir, a nucleoside analogue with demonstrated activity against Feline Herpesvirus (FHV-1).

Backed by Published Feline Research

Famciclovir for cats is supported by a body of published feline pharmacokinetic and clinical work, including dose-optimisation modelling and a 59-case clinical series covering ocular, respiratory, and dermatologic disease attributed to Feline Herpesvirus (FHV-1). This evidence base informs the widely cited dosing approach of approximately 90 mg/kg every 12 hours used under veterinary direction.

Formulated for Cats, Not From Human Medications

Famciclovir is regarded as systemically safe in cats when dosed appropriately. This is an important distinction from acyclovir and valacyclovir, human antivirals associated with toxicity in cats. HerpX™ is intended specifically for feline use under veterinary guidance.

Support Across the Main Forms of Feline Herpesvirus (FHV-1)

HerpX™ is intended to support cats through:

• Ocular flares (conjunctivitis and corneal disease)

• Upper respiratory flares (sneezing, nasal discharge, congestion)

• Recurrent flares triggered by stress

Consistent Dosing, Clear Guidance

• Fixed 180 mg coated tablet for repeatable weight-based dosing

• Designed around the published feline dosing literature

• Used under veterinary supervision.

HerpX™ provides a clearer, more controlled path to managing Feline Herpesvirus (FHV-1) flares and protecting your cat's comfort and eyes.

Active Ingredient:  Famciclovir

Inactive Ingredients: Dibasic Calcium Phosphate, Magnesium Stearate
Form: 180 mg coated tablets

Indications: Antiviral support for cats with Feline Herpesvirus (FHV-1), including ocular and upper respiratory flares

Specification: 60 tablets, each containing 180 mg famciclovir

Dosage: Approximately 90 mg/kg every 12 hours, or as directed by your  veterinarian. See Dosage Instructions.

Length of Treatment:  Continue until all symptoms have disappeared,  or as directed by a veterinarian;  do not reduce or taper dose without veterinary direction.

Storage: Store in a dry, cool place away from sunlight.