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Famciclovir Tablet Rx

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Product Overview

How To Use

What’s in it?


Questions & Answers

Product Description

Famciclovir is an antiviral medication prescribed by veterinarians to treat symptoms in cats with feline viral rhinotracheitis (FVR) and feline herpes virus (FHV). These upper respiratory illnesses are infections associated with infection with feline herpesvirus.

Who is Famciclovir Tablet for?

For use in cats.

Why use Famciclovir Tablet?

Famciclovir works to treat symptoms of cats with feline viral rhinotracheitis and feline herpes virus.

How does Famciclovir Tablet work?

This prescription-only antiviral medication is a nucleoside analog DNA polymerase inhibitor. This drug works to prevent DNA reproduction of viruses, diminishing the ability of such viruses to spread throughout your cat's body.


Camber, AmerisourceBergen, North Star, Teva or other generic brand

Active ingredient(s):


How is Famciclovir Tablet sold?

Sold by the tablet in 125 mg, 250 mg or 500 mg strengths.

What are the side effects of Famciclovir Tablet?

Famciclovir is considered effective and safe for cats, but it is a strong drug and can cause adverse reactions in some cats. These include:
  • Low-grade fever
  • Diarrhea
  • Vomiting
  • Nausea
Administer this drug with a meal to reduce chances of stomach upset.

Hypersensitivity could also occur. If your cat seems to be having any side effects from use of this medication, withdraw use and consult your veterinarian.

What special precautions are there?

  • Use caution in administering to cats on Probenecid, cats with renal dysfunction, or cats who are nursing.
  • Never administer to cats with penciclovir allergies.
  • Keep out of reach of animals and children.

What to do if overdose?

Contact your nearest emergency animal hospital

How can I store Famciclovir Tablet?

Store in a dry and cool environment.

Helpful Tips:

Contact your closest emergency pet hospital.

Pharmacists are standing by to offer Pet Parent counseling regarding prescription medication purchased from Allivet before and after dispensing. Pharmacists on duty are available Monday-Friday, 9:30AM - 5:30PM EST and will be on call Saturday 12:00PM - 4:00PM EST for consultation.


Use as directed by your vet.

Main Ingredients


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Famciclovir Tablet

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