HerpX™ is an oral antiviral tablet (famciclovir 180 mg) for cats with Feline Herpesvirus (FHV-1). It is used under veterinary guidance to support cats through ocular and upper respiratory flares, including conjunctivitis and corneal disease, by reducing viral replication and shedding so flares settle faster.

They treat different viruses with different molecules. CaliciX™ and MolnuFIP™ use EIDD-1931 for Feline Calicivirus (FCV) and FIP. HerpX™ uses famciclovir, the antiviral most established for Feline Herpesvirus (FHV-1). If your cat's problem is the eyes and upper respiratory tract rather than oral disease, HerpX™ is the relevant product.

No. Feline Herpesvirus (FHV-1) stays latent in the body for life, so no treatment removes it. HerpX™ is used to control active flares and protect the eyes, helping signs resolve more quickly. Most cats live normal, comfortable lives with good flare management.

The eyes are the hallmark of Feline Herpesvirus (FHV-1), and active ocular flares are exactly where prompt antiviral support matters most. HerpX™ reaches therapeutic levels in tears and is used for ocular flares, often alongside topical eye treatment chosen by your veterinarian. A squinting, cloudy, or ulcerated eye should be seen urgently.

Famciclovir is regarded as systemically well tolerated in cats when dosed correctly. This is an important distinction from acyclovir and valacyclovir, human antivirals that are toxic to cats and must never be used in their place. HerpX™ is made for feline use under veterinary supervision.

No. HerpX™ is a direct-acting antiviral. Antibiotics act only on secondary bacterial infections, not on the virus itself, and are used separately only when your veterinarian indicates them.