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.
HerpX™ 180mg – Antiviral Therapy for Feline Herpesvirus (FHV-1)
Famciclovir is dosed by feline body weight at approximately 90 mg/kg every 12 hours, the dosing approach supported by published feline studies. Because exact dose depends on your cat's weight and your veterinarian's assessment, confirm the number of HerpX™ 180 mg coated tablets per dose with your veterinarian.
Indicative guide (confirm with your veterinarian):
~2 kg cat ≈ 180 mg per dose (1 tablet) every 12 hours
~4 kg cat ≈ 360 mg per dose (2 tablets) every 12 hours
~6 kg cat ≈ 540 mg per dose (3 tablets) every 12 hours
Monitoring and follow-up:
We recommend ongoing veterinary evaluation during treatment so your veterinarian can assess response and decide on continuation or adjustment. Antiviral dosing should not be tapered or reduced without veterinary direction.
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