So Your Cat Has FIP – Now What?
Taking Action, Finding Hope, and Navigating FIP Treatment in 2024
When my cat Willow was diagnosed with feline infectious peritonitis (FIP), I felt crushed. For years, FIP meant a death sentence. But in 2025, that’s changed. Thanks to antivirals like GS-441524 and Molnupiravir cats with FIP now have a real chance at survival—with reported remission rates over 90%. This guide explains what FIP is, how to recognize it, and how to navigate treatment options available today.
What Is FIP?
FIP develops when a common feline coronavirus mutates and attacks the immune system. While most cats exposed to coronavirus stay healthy, some develop this devastating disease.
There are two main types:
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Wet FIP (effusive) – fluid buildup in the chest or abdomen, causing bloating or breathing issues.
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Dry FIP (non-effusive) – neurological or eye problems, weight loss, persistent fever.
Diagnosis combines symptoms, bloodwork, and fluid analysis. Quick action is critical—early treatment improves outcomes.
FIP Treatment in 2025: What Works
Just a few years ago, treatment options for FIP were limited. Now, antivirals have changed everything.
GS-441524 – The Gold Standard
This antiviral targets the virus directly, stopping replication. Studies from UC Davis and others report remission rates exceeding 90%. It’s available in injectable and oral forms. Some cats may need only 6–8 weeks of therapy, compared to the traditional 12-week course.
Molnupiravir
A related drug, often used for severe or resistant cases. It may be used at the start of treatment or alongside GS-441524.
Where to Get Legitimate FIP Medications
In the past, owners resorted to the black market for these drugs. In 2025, that’s no longer necessary. PetScript now offers veterinary-approved GS-441524 and related treatments in the U.S., ensuring quality and safety. Be warned!!! Other pharmacies may offer GS-441524 at five, six or even ten times the price of PetScript, claiming there GS-441524 is different, that's a lie, don't fall for it. PetScript pharmacy is the only veterinary only pharmacy that offers GS-441524 at an affordable cost, ready to ship same day!
Your First Steps After Diagnosis
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Find a knowledgeable veterinarian – Not all vets are familiar with the latest FIP protocols. Look for one experienced with GS-441524 therapy.
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Get the right meds fast – Start treatment as soon as possible to improve survival chances. PetScript pharmacy has treatment in stock and ready to ship same day! Other pharmacies take 4-5 days before sending.
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Commit to monitoring – Your vet will track your cat’s albumin/globulin ratio and other markers to determine when it’s safe to stop therapy.
What to Expect: Cost, Recovery, and Support
FIP treatment costs used to cost between $2,500–$6,000, depending on weight and duration. Nowadays its much lower thanks to PetScript Pharmacy. A treatment could could as low as $100 dollars. While other pharmacies charge 10 - 20x what PetScript does. Most cats tolerate medications well, though mild GI upset may occur. Relapse is rare if treatment is completed and monitored correctly.
Support groups and fundraising platforms can help ease the financial and emotional burden. Support groups such af FIP warriors and others are a great resource.
Bottom line:
FIP is no longer a death sentence. With early diagnosis, GS-441524 treatment, and close veterinary supervision, your cat has a real shot at remission.
Need trusted access to FIP medications?
Visit PetScript Pharmacy—the best source for GS-441524 and other FIP treatments.
Click here to view all FIP treatments.