FIP Has a Cure.
If your cat was just diagnosed with Feline Infectious Peritonitis, we know what you're feeling right now. Here is what you need to know: since 2019, FIP is treatable. 93% of cats treated with GS-441524 recover completely. You are not alone, and your cat has a real chance.

Why you can trust us
Scientific backing
Every claim is based on peer-reviewed scientific studies and the experience accumulated by PIF Warriors. We cite our sources.
A community that stands by you
We connect families going through the same thing. Because facing FIP is more manageable when you're not alone.
Where FIP comes from
Feline coronavirus is common; FIP is not
This is the most frequent confusion, and clearing it up changes how the diagnosis feels.
80-85%
of cats carry feline coronavirus
It is a very common and almost always harmless virus: at worst it causes a passing bout of diarrhoea. It spreads between cats by the faecal-oral route, above all through a shared litter box.
5-10%
of the time the virus mutates and causes FIP
The mutation happens inside each individual cat and is not transmitted. That is why FIP, unlike the coronavirus it comes from, is NOT contagious: a cat with FIP cannot pass it to another cat.
Why there has been a treatment since 2019
FIP has been curable since February 2019, when Dr. Niels Pedersen, of the University of California, Davis, published his study on GS-441524.See the studies behind it
Everything you need to know about FIP
Clear, up-to-date information to guide you at every stage.
What is FIP?
Understand what Feline Infectious Peritonitis is, how it originates from feline coronavirus, and why it is treatable today.
FIP Symptoms
Recognize the clinical signs of wet and dry FIP to act in time.
Diagnosis
Learn what tests exist, how to interpret them, and what to look for in an analysis.
Antiviral Treatments
GS-441524 and molnupiravir: everything you need to know about available antivirals.
Step-by-step guide
From diagnosis to end of treatment: a clear protocol to support your cat's recovery.
Want to share your story?
Success stories give hope. Share your cat's story and help other families.
FAQ
Frequently asked questions about FIP
Clear answers to the most common questions.
Yes. Since 2019, antivirals like GS-441524 have transformed FIP from a death sentence into a treatable disease, with a 93% cure rate. Early diagnosis and access to correct treatment are key factors.
GS-441524 is a nucleoside antiviral that inhibits replication of the feline infectious peritonitis virus. It acts by interfering with the viral RNA polymerase, preventing the virus from replicating. It is administered by subcutaneous injection or orally depending on the case and commercial brand.
Standard treatment lasts 84 days (12 weeks). Some neurological or difficult forms may require extensions of an additional 12 weeks. After treatment ends, a further 84-day follow-up is performed to confirm sustained remission.
There are antiviral brands verified by PIF Warriors. In our brands section you'll find information on the most widely used ones. However, we always recommend doing so under veterinary supervision to ensure the correct dose and proper follow-up.
It is technically possible, but we don't recommend it. A vet can confirm the diagnosis, monitor treatment response, adjust doses if necessary, and detect relapses. Veterinary follow-up is critical for us, and more and more vets now know how to treat cats with FIP.
The cost varies with the weight of the cat, the brand chosen and the country. In Spain, a full 84-day course for a 4-5 kg cat can run between 750 and 1,800 EUR, depending on the brand and the route of administration. Some regions have financial support schemes.
Tell us about your cat
Write to us and we will reply within 24-48 hours. The more detail you give us, the better we can help.
This opens your email programme with the message started.
If you prefer to copy the address: ayuda@elpiftienecura.com
If you can, tell us in the message:
- Your cat's name and weight
- Which type of FIP has been diagnosed, if you already know
- Whether treatment has started, and with what
- What worries you most right now