Facing an FIP Diagnosis? Here’s What You Need to Know

If your cat has recently been diagnosed with Feline Infectious Peritonitis, or FIP, you are probably trying to answer several questions at once: how treatment works, how much medication your cat needs, what it may cost, and how to maintain a reliable medication supply throughout treatment.

The most important thing to know is that FIP is no longer the diagnosis it once was. Antiviral treatment with GS-441524 has changed the outlook for cats with FIP, with treatment success rates exceeding 90% when an appropriate treatment course is completed.

This guide walks you through the process in a practical order: understanding the treatment plan, determining your cat’s medication needs, estimating the cost, finding financial support, and preparing a dependable supply throughout the full treatment journey.

1. The 84-Day Treatment Plan: Start With Injections, Then Transition to Oral Tablets

One of the first questions many cat parents ask is whether their cat needs injections throughout the entire 12-week treatment period. The answer is no.

The treatment approach is a hybrid plan: begin with GS-441524 injections during the first two weeks, then transition to oral tablets once the cat is stable, eating normally, and responding well.

2. What Determines How Much GS-441524 Your Cat Needs?

Before estimating treatment cost, you first need to understand what determines medication use. The amount your cat needs depends primarily on body weight, the type and severity of FIP, and the full duration of treatment.

A. Your Cat’s Weight

GS-441524 dosing is calculated according to body weight in milligrams per kilogram (mg/kg). A smaller kitten naturally requires less medication than a larger adult cat.

• A 2 kg (4.4 lb) kitten requires a smaller daily amount.
• A 5 kg (11 lb) adult cat requires substantially more medication over the same treatment period.

B. The Type and Severity of FIP

Different forms of FIP require different GS-441524 doses.

• Wet FIP: Dosing depends on whether fluid is present in the abdomen or chest.
• Dry FIP: Treatment accounts for disease affecting internal organs without obvious fluid accumulation.
• Ocular FIP: Eye involvement requires a higher treatment dose.
• Neurological FIP: Neurological symptoms require the highest dosing level shown in the calculator below.

C. The Full 84-Day Treatment Period

Treatment is planned across 84 consecutive days. Even when a cat begins acting normal within the first few weeks, medication still needs to continue throughout the treatment course.

This is why it is useful to calculate more than just the daily dose. You also need to understand how many vials or tablets your cat may need, what the full supply may cost, and how pricing changes with the quantity required.

3. Realistic 2026 FIP Cost Breakdown

To help you budget, here is an estimated cost breakdown for GS-441524 medication (Injections + Oral Tablets) over a standard 84-day treatment journey.

4. Financial Relief for Cat Parents, Rescues, and Foster Networks

Once you understand your cat’s treatment needs, the next question is usually cost. An 84-day treatment is a serious commitment, especially for rescue organizations caring for more than one cat at a time.

At MaxPaw Health, our goal is to make treatment more accessible for individual cat parents as well as rescues, shelters, and foster networks.

5. Reliable Supply for Rescues in the US, Dubai, the Philippines, and Beyond

Treatment only works when medication is available consistently. Running out halfway through an 84-day course creates unnecessary stress for both the cat and the person providing care.

MaxPaw Health works with cat parents, rescuers, foster groups, and rescue organizations in multiple regions, including the United States, Dubai, the Philippines, and other international markets.

For rescue groups treating multiple cats, a dependable supply relationship is especially important. It helps organizations plan treatment in advance rather than searching for medication every time a new FIP case appears.

• Consistent medication supply: Treatment can continue without unnecessary interruptions caused by local inventory shortages.
• Better pricing for larger treatment needs: Volume and rescue discounts help reduce costs for organizations treating multiple cats.
• International delivery: Orders can be shipped to North America, the Middle East, Southeast Asia, Europe, and other supported locations with tracking.

6. Why Medication Consistency Matters Throughout the 84 Days

Once treatment has started, changing between uncertain suppliers or discovering halfway through treatment that medication is unavailable can make an already difficult situation much harder.

When choosing where to obtain GS-441524, consider more than the price of a single vial or box. You also need to know that the medication, concentration, and supply will remain consistent throughout the full course.

What to Look for in a Reliable Supply

• Consistent concentration and dosage: The medication should match the concentration used to calculate your cat’s dose.
• Reliable availability: Make sure you can obtain enough medication to continue treatment without unexpected gaps.
• Clear pricing: You should be able to understand how much medication you need and what you will pay before committing to the full course.
• Support during treatment: Questions often arise as your cat gains weight, transitions from injections to tablets, or needs additional supply.

MaxPaw Health provides GS-441524 injections and oral tablets and supports cat parents throughout the 84-day treatment process, including the transition from injections to oral medication.

7. How to Get Started

If your cat has recently been diagnosed with FIP, you do not need to solve every part of treatment at once. Start with the information you need for the first decision, then work through the process step by step.

1. Weigh your cat accurately.
   Use a digital scale and record your cat’s current weight. Continue weighing your cat regularly during treatment because the dose may need to increase as weight returns.
2. Identify the form of FIP and relevant symptoms.
   Determine whether your cat has wet, dry, ocular, or neurological symptoms so you can select the appropriate option in the calculator.
3. Use the GS-441524 calculator above.
   Adjust your cat’s weight, select the medication format, choose the symptom type, and review the calculated daily dose, medication quantity, and estimated treatment cost.
4. Plan the first two weeks.
   Prepare the injection supply required for the initial treatment phase so treatment can begin without interruption.
5. Prepare for the transition to oral medication.
   As your cat stabilizes, plan the tablet supply required for the remaining ten weeks.
6. Contact us if you need rescue pricing or financial support.
   If you are treating multiple cats, represent a rescue organization, or need help managing treatment costs, contact our team before placing your order.