FIP Treatment Cost in Australia and New Zealand: 2025 Guide

If you are reading this at 2am with a sick cat curled beside you, take a breath. Feline Infectious Peritonitis (FIP) was once a death sentence, but thanks to GS-441524, it no longer is. Right now, though, you probably have a more immediate worry on your mind: what is this actually going to cost?

Cost transparency matters. Pawrents in Australia and New Zealand deserve straight answers, in AUD, with no hidden conversions from US pricing and no vague "contact us" runarounds. This guide walks you through every line item you can realistically expect across a 12-week FIP treatment course, so you can plan, budget, and focus on what matters most: your cat's recovery.

A cat resting comfortably at home.

Quick Summary: What FIP Treatment Costs in Oceania

• Antiviral medication (12 weeks): the largest single expense, ranging widely depending on your cat's weight, FIP form, and whether you choose injectables, oral capsules, or a dual antiviral approach.

• Veterinary fees: diagnosis, bloodwork, imaging, follow-up monitoring.

• Supportive care: appetite stimulants, fluids, organ support if needed.

• Post-treatment observation: a 12-week watch period after the last dose to confirm sustained remission.

Clinically proven: GS-441524 monotherapy delivered a 92% success rate in the landmark UC Davis study (Pedersen 2019). The newer dual antiviral therapy combining GS-441524 with EIDD-1931 has shown 78.3% remission in cats with more challenging presentations (Li and Cheah 2025). Over 100,000+ cats have been treated worldwide since 2019.

Why FIP Treatment Costs What It Does

FIP treatment is not a single pill. It is a full 84-day antiviral protocol that must be delivered consistently, every single day, without missed doses. Three factors drive the total cost:

1. Your cat's weight. Dosing is calculated per kilogram, so a 6 kg adult cat needs more medication than a 2 kg kitten.

2. The form of FIP. Wet, dry, ocular, and neurological forms require different per-kg doses. Neurological and ocular cases need higher concentrations to cross protective barriers in the eye and brain.

3. The treatment route you and your vet choose. Injectable GS-441524, oral capsules, or a dual antiviral combination each have different price points.

Let us break this down by line item.

1. The Antiviral Medication: GS-441524 Price in AUD

This is the hero of FIP treatment, and the largest part of your budget. CureFIP Oceania offers three core antiviral options at fixed AUD pricing.

GS-441524 Antiviral Injectable, 20mg/ml, 8ml, AU$79.00

The entry-level injectable concentration. Available with B12 or without B12. B12 (cyanocobalamin) is often included to support appetite and reduce injection-site discomfort.

Dosing (as per Pedersen et al., UC Davis, PMC6435921):

• Wet FIP: 6 mg/kg

• Dry FIP: 8 mg/kg

• Ocular FIP: 10 mg/kg

• Neurological FIP: 10 mg/kg

One subcutaneous injection per day, 7 days a week, for 12 weeks (84 days).

GS-441524 Antiviral Injectables, 30mg/ml, 8ml, AU$99.00

The higher concentration injectable, also available with or without B12. This is the more practical option for larger cats or higher-dose protocols (ocular and neurological), because each ml delivers more active ingredient, meaning a smaller injection volume.

Dosing follows the same per-kg schedule: wet 6 mg/kg, dry 8 mg/kg, ocular 10 mg/kg, neurological 10 mg/kg, daily for 84 days.

CureFIP Oral Capsules, Dual-Action Formula, AU$139.00

For pawrents who cannot face 84 daily injections (and that is a completely understandable position), CureFIP offers a dual-action oral capsule combining GS-441524 with EIDD-1931.

Dosing by weight, one capsule per day, for 12 weeks:

• Under 2.5 kg: GS-441524 25 mg + EIDD-1931 5 mg

• 2.5 to 5 kg: GS-441524 35 mg + EIDD-1931 8 mg

• Over 5 kg: GS-441524 50 mg + EIDD-1931 12 mg

A note from the clinical side: oral dual therapy is positioned for wet and dry FIP. It is generally not recommended once ocular or neurological signs are present, or if your cat cannot eat or defecate reliably. Discuss the right route with your veterinarian.

EIDD-1931 Oral Capsules, AU$39.00

Used in dual antiviral protocols and for specific clinical scenarios. Dosing: 1 capsule (15 mg) per 2.5 kg body weight, every 12 hours, with 60 capsules per bottle and a standard 60-day course. Not for ocular or neurological cases, and not for cats that are not eating or defecating. EIDD-1931 is teratogenic and must not be given to pregnant or lactating queens.

Estimating Your Total Medication Spend

Because dosing is weight-based and the form of FIP changes the daily mg, your total medication spend will sit on a wide spectrum. As a rough framing:

• A small cat with wet FIP on the 20mg/ml injectable will sit at the lower end of the medication budget.

• A larger cat with neurological FIP on the 30mg/ml injectable, requiring 10 mg/kg daily, will sit at the higher end.

• Oral capsules at AU$139.00 per bottle represent a different cost model again, calculated per bottle rather than per ml.

Your veterinarian or the CureFIP Oceania team can calculate the exact number of vials or bottles your cat will need for the full 84-day course based on current weight. We strongly recommend doing this calculation before you begin, so there are no supply gaps mid-treatment. Missed doses are the single biggest predictor of relapse.

2. Veterinary Diagnosis and Monitoring Fees

FIP cannot be confirmed by a single test. Diagnosis usually involves a combination of:

• Clinical examination by your vet

• Full blood panel including albumin to globulin (A:G) ratio

• Imaging (ultrasound or x-ray) to detect effusion in wet FIP

• Effusion analysis if fluid is present (Rivalta's test, PCR)

• Feline coronavirus (FCoV) titres in some cases

Vet fees vary widely across Australia and New Zealand. Metropolitan clinics in Sydney, Melbourne, Auckland, and Wellington typically charge more than regional practices. Expect initial diagnostic workup to be a meaningful line item, and budget for follow-up bloods at roughly week 4, week 8, and week 12, plus a final clearance panel at the end of the 12-week observation period. Always confirm pricing with your own clinic directly.

3. Supportive Care During Treatment

Just like us humans who lose our appetite when sick, cats with FIP often stop eating. In the first one to two weeks of antiviral therapy, while the virus is being suppressed, your cat may need:

• Appetite stimulants (mirtazapine, capromorelin)

• Subcutaneous fluids for hydration support

• Anti-nausea medication

• Liver and kidney support as adjunct organ care (optional, discuss with your vet)

The good news: most cats turn a corner within 72 hours of starting GS-441524. Appetite returns, fevers drop, and the visible signs of illness begin to recede. Supportive care costs are usually concentrated in the first two weeks, then taper down significantly.

4. The Observation Period

After the final dose on day 84, your cat enters a 12-week observation window. This is not extra treatment, it is watchful waiting to confirm sustained remission. Costs here are minimal: usually one or two recheck bloodwork appointments. Relapse, if it occurs, typically appears in this window, which is why the recheck schedule matters.

How FIP Treatment Cost in Australia Compares to Doing Nothing

This is the hardest comparison to write, but pawrents deserve honesty. Untreated FIP is fatal. The cost of "doing nothing" is your cat. The cost of treatment is real money, but it buys a clinically proven path to recovery, with success rates of 92% for GS-441524 monotherapy and 78.3% for the dual antiviral protocol in published case series.

For most families, the question is not whether to treat, but how to structure the spend. A few practical tips:

1. Buy the full 84-day course up front where possible. This avoids any supply gaps and locks in your medication strategy.

2. Choose the right concentration for your cat's weight. The 30mg/ml injectable at AU$99.00 is often more economical per mg for larger cats than the 20mg/ml at AU$79.00.

3. Talk to your vet about supportive care as needed, not as a default. Not every cat needs every adjunct.

4. Do not skip the post-treatment monitoring. Catching a relapse early is far cheaper, in every sense, than catching it late.

Why CureFIP Oceania Pricing Is Fixed in AUD

We price in Australian dollars because our pawrents live in Australia and New Zealand. No exchange rate surprises, no US-centric framing, no hidden fees on currency conversion. The prices listed above are the prices you pay.

GS-441524 is the clinically proven antiviral backbone of FIP recovery, and CureFIP has supplied this molecule to a global network that has now treated 100,000+ cats since 2019. That is the scale of evidence behind the protocol your vet will discuss with you.

FAQ

How much does a full course of GS-441524 cost in Australia and New Zealand?

It depends on your cat's weight and FIP form. The injectables are priced at AU$79.00 for the 20mg/ml, 8ml vial and AU$99.00 for the 30mg/ml, 8ml vial. The exact number of vials needed for the full 84-day course should be calculated by your veterinarian based on your cat's current weight and the per-kg dose for their FIP form (6 mg/kg wet, 8 mg/kg dry, 10 mg/kg ocular or neurological).

Is the oral capsule option cheaper than injections?

The CureFIP Oral Capsules Dual-Action Formula is priced at AU$139.00. Whether oral works out cheaper or more expensive than injections depends on your cat's weight band and the length of the course. The bigger question is clinical fit: oral dual therapy is positioned for wet and dry FIP, and is generally not recommended for ocular or neurological cases. Your vet will help you choose the right route.

Does pet insurance in Australia or New Zealand cover FIP treatment?

Coverage varies by insurer and policy. Some Australian and New Zealand pet insurance policies will reimburse a portion of diagnostic and supportive care costs. Always check your specific policy wording and speak to your insurer before starting treatment.

What happens if I cannot afford the full 12 weeks?

Stopping antiviral therapy early is the single biggest driver of FIP relapse. If budget is a concern, speak openly with your veterinarian and with the CureFIP Oceania team before you begin. Planning the full 84-day course up front, choosing the right concentration for your cat's weight, and avoiding supply gaps mid-treatment is far more cost-effective than restarting after a relapse.

Are there cheaper FIP treatments that work just as well?

GS-441524 is the clinically proven antiviral with the strongest published evidence base, including the UC Davis 92% success rate for monotherapy and 78.3% remission for the dual antiviral protocol with EIDD-1931. Be very cautious of unverified products sold below market pricing. With FIP, you are paying for a clean, correctly concentrated molecule delivered consistently for 84 days. That is what moves the needle on survival and long-term health.

Written for cat owners in Australia and New Zealand. All treatment decisions should be made with your veterinarian.