Kitten with FIP  

Avishay Greenberg
Originally Answered: Kitten with FIP


My five months Maine Coon was diagnosed today with wet FIP.

He was diagnosed by liquid taken from his very swollen abdomen and blood tests. Both gave positive results and he have very high lymphocytes.

He started today ten days antibiotic treatment - Amoxy Clav 0.25mg twice a day for 10 days. Dipyrone (Optalgin) drops for pain treatment and something to increase his appetite.

Is there anything else I can do for him? 


Mallory Crusta
Originally Answered: Kitten with FIP

Hello Avishay. I'm sorry that your kitten is sick. You might be interested in the FIP Warriors Facebook group, which provides assistance to cats with FIP, including helping them find access to antiviral drugs that have recently shown the ability to help cats with FIP. I'm not sure where you live, but the antiviral compound GS-441524 is not approved for prescription to cats in the United States, but there are ways to pursue GS-441524-like therapy for cats, and the results have been very promising among other unlicensed uses. Anyway, I'm not a vet, and you'll receive a reply from a veterinarian soon, but I wanted to jump in and give you some ideas for additional treatment options.

Aisling O'Keeffe MVB CertSAM ISFMAdvCertFB
Originally Answered: Kitten with FIP

Hi Avishay,

Firstly I’m so sorry to hear that your cat has been diagnosed with FIP.

As you may already know, FIP is a viral disease that has a high fatality rate. Until a couple of years ago, there was no specific treatment for FIP. As Mallory mentioned above, there now is an antiviral treatment that has been used to treat FIP successful which has been an amazing development for cats with FIP.

The drug remdesivir, a prodrug of GS-441524, became legal in the UK and Australia since 2021. It has success rate of 80% and the treatment is required for 84 days.

It can be expensive but it’s the only treatment known to successfully treat FIP. I’m not sure what part of the world you’re living in but the drug can be exported to some countries so it’s worth having a chat with your vet about this and checking out the facebook page that Mallory suggested above.

Apart from this drug, your cat will also need supportive treatment too. This involves monitoring that they’re drinking and not dehydrated, eating a high quality diet and treating any secondary infections with antibiotics (which your vet is doing at the moment with amoxy clav). As your cat has wet FIP, any fluid build ups (in the abdomen or chest cavity) might also need to be drained if they’re causing discomfort to your cat.

If you have any more questions please feel free to ask,



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