Famciclovir For Cats: Uses, Dosage, & Side Effects

Red cat looking curious to a open pill box, maybe famciclovir. Horizontal image with copy space.

(Picture Credit: Lightspruch/Getty Images)

Famciclovir for cats is an anti-viral medicine that veterinarians primarily prescribe to treat feline herpes or, in some cases, upper respiratory diseases. It’s the generic name for a drug that’s also sold under the brand name Famvir.

The medication works by stopping the spread of the herpes virus, and it can also help alleviate any painful symptoms. It comes in tablet or liquid form, and you’ll need a prescription from your veterinarian to purchase it. The drug is FDA approved for human use; although, vets also often prescribe it for cats.

You can easily order famciclovir for your cat online from Chewy’s pharmacy with your vet’s prescription. Closely follow your vet’s instructions for the correct and safe dosage and frequency.

Here’s what you should know about the uses, dosage, and side effects of famciclovir for cats.

Uses Of Famciclovir For Cats

Veterinarians generally prescribe famciclovir for cats to treat infections of the feline herpes virus (which is also known as FHV-1).

The drug works by stopping the spread of the herpes virus. It can also help with calming associated symptoms such as fever, conjunctivitis, and sneezing.

Dosage Of Famciclovir For Cats

Cat at veterinarian

(Picture Credit: Nastasic/Getty Images)

The following is a guideline for typical use of the drug in cats and must not replace your veterinarian’s advice for your individual pet.

Veterinarians can prescribe famciclovir for cats in a dosage as high as 40 mg per pound of the cat’s body weight given twice a day. This can, however, vary significantly depending on the severity and the type of condition they’re treating.

You must rely on your own veterinarian’s prescription for the correct dosage.

It’s important to always follow the exact dosage and administration instructions as detailed by your vet. This includes the length of time you should give the medicine to your cat. Even if symptoms clear up early, it’s imperative that you finish administering the full course to your cat.

Side Effects Of Famciclovir For Cats

Famciclovir can produce a range of side effects in cats. The most common side effects of giving famciclovir to a cat are urinating more and showing a loss of appetite.

Veterinarians rarely prescribe this drug to pregnant cats.

If you believe your cat took too much of the medication and is suffering from an overdose, then you must contact your emergency veterinarian right away.

Has your vet ever prescribed famciclovir to your cat? Did it help them recover from an infection? Let us know in the comments section below!