How Much Does FIP Treatment Cost for a Cat in Australia?

Key takeaway: FIP treatment cost in Australia depends on three things: your cat's weight, which of the four forms of FIP your cat has, and whether you use GS-441524 injectables or oral capsules. With CureFIP, GS-441524 Antiviral Injectable starts at AU$79.00 per 8ml vial (20 mg/ml), and the protocol runs for 84 days. Your total comes from how many vials or capsules that 84-day course requires at your cat's prescribed dose, which your veterinarian confirms.

Feline Infectious Peritonitis (FIP) is a serious viral disease, and the cost of treating it is one of the first questions Pawrents in Australia and New Zealand ask. This guide lays out the real pricing from the CureFIP Oceania catalog, explains why two cats can have very different totals, and shows how the antiviral, the form of FIP, and your cat's weight all shape the final number. We are clear about what the figures show and what your veterinarian still needs to confirm.

A cat resting comfortably at home.

What drives the cost of FIP treatment in Australia?

The cost of FIP treatment in Australia is driven by your cat's body weight, the form of FIP, the antiviral route you choose, and the fixed 84-day protocol length. GS-441524 is the antiviral at the core of modern FIP treatment, and the dose is calculated per kilogram, so a heavier cat needs more medication and costs more across the same 84 days. Veterinary monitoring, diagnostics, and any supportive care are separate costs handled by your clinic.

The main cost factors are:

• Your cat's weight in kg. Every dose is set per kilogram, so a 6 kg cat uses more product than a 3 kg cat over the same course.

• The form of FIP. Wet, dry, ocular, and neurological FIP carry different per kilogram doses, and the higher doses cost more.

• The antiviral product. Injectables and oral capsules are priced differently per unit.

• The 84-day protocol. A standard course runs 84 days (12 weeks) under veterinary supervision, so daily dosing adds up across that fixed window.

• Veterinary fees. Diagnosis, bloodwork, and follow-up monitoring are billed by your clinic and sit outside the product price.

How does the form of FIP change the dose and cost?

The form of FIP changes the per kilogram dose, and a higher dose means more medication and a higher cost across the 84-day protocol. FIP takes four forms, wet, dry, ocular, and neurological, and each one has its own GS-441524 dose in the CureFIP injectable protocol. Because ocular and neurological FIP use the highest per kilogram dose, those cases generally cost the most to treat.

Wet (Effusive) FIP

Wet FIP causes fluid to build up in the abdomen or chest. In the CureFIP injectable protocol, wet FIP is dosed at 6 mg/kg, given as 1 subcutaneous injection per day, 7 days a week, for 84 days. This is the lowest of the four doses, so wet FIP cases often sit at the lower end of the cost range for a cat of a given weight.

Dry (Non-effusive) FIP

Dry FIP develops without significant fluid and can affect internal organs. In the CureFIP injectable protocol, dry FIP is dosed at 8 mg/kg, given as 1 subcutaneous injection per day, 7 days a week, for 84 days. The higher dose means a dry FIP case typically costs more than a wet FIP case of the same weight.

Ocular FIP

Ocular FIP affects the eyes and can cause colour changes, cloudiness, or vision problems. In the CureFIP injectable protocol, ocular FIP is dosed at 10 mg/kg, given as 1 subcutaneous injection per day, 7 days a week, for 84 days. This is one of the two highest doses, so ocular cases sit toward the upper end of the cost range.

Neurological FIP

Neurological FIP affects the brain and spinal cord and can cause balance problems, tremors, or seizures. In the CureFIP injectable protocol, neurological FIP is dosed at 10 mg/kg, given as 1 subcutaneous injection per day, 7 days a week, for 84 days. Like ocular FIP, the higher dose places neurological cases at the upper end of the cost range.

FIP form	GS-441524 dose	Schedule	Duration
Wet / Effusive	6 mg/kg	1 injection/day, 7 days/week	84 days
Dry / Non-effusive	8 mg/kg	1 injection/day, 7 days/week	84 days
Ocular	10 mg/kg	1 injection/day, 7 days/week	84 days
Neurological	10 mg/kg	1 injection/day, 7 days/week	84 days

Reference for the injectable protocol: Pedersen et al., UC Davis (PMC6435921).

What do CureFIP FIP products cost in Australia?

CureFIP Oceania lists GS-441524 Antiviral Injectable (20 mg/ml, 8ml) at AU$79.00, GS-441524 Antiviral Injectables (30 mg/ml, 8ml) at AU$99.00, and CureFIP Oral Capsules - Dual-Action Formula at AU$139.00. These are the per unit prices in AUD, shown exactly as listed. Your total depends on how many units the 84-day course requires at your cat's prescribed dose.

Product	Strength	Price (AUD)	Route
GS-441524 Antiviral Injectable, 8ml	20 mg/ml	AU$79.00	Subcutaneous injection
GS-441524 Antiviral Injectables, 8ml	30 mg/ml	AU$99.00	Subcutaneous injection
CureFIP Oral Capsules - Dual-Action Formula	GS-441524 + EIDD-1931	AU$139.00	Oral capsule
EIDD-1931 Oral Capsules	15 mg per capsule	AU$39.00	Oral capsule

Both injectable strengths come with a With B12 or Without B12 option. The 30 mg/ml injectable holds more GS-441524 in the same 8ml volume, which can mean fewer vials and a smaller injection volume per day for heavier cats. Your veterinarian helps you choose the strength that fits your cat's weight and prescribed dose.

How many vials will an 84-day course need?

The number of vials depends on your cat's weight and FIP form, because both set the daily milligram dose, and the 8ml vial volume is fixed. To estimate, multiply the per kilogram dose by your cat's weight to get the daily milligrams, then divide by the vial's strength to get the daily volume, then multiply across 84 days. Your veterinarian confirms the exact dose and the number of vials your cat needs.

Here is one illustrative example for a 4 kg cat with wet FIP, dosed at 6 mg/kg. This is an example only, and your cat's weight and dose may differ:

1. Daily dose: 6 mg/kg multiplied by 4 kg equals 24 mg per day.

2. Total over 84 days: 24 mg multiplied by 84 days equals 2,016 mg.

3. Using the 20 mg/ml, 8ml vial (160 mg per vial): 2,016 mg divided by 160 mg is about 13 vials, which at AU$79.00 each is roughly AU$1,027.

4. Using the 30 mg/ml, 8ml vial (240 mg per vial): 2,016 mg divided by 240 mg is about 9 vials, which at AU$99.00 each is roughly AU$891.

A heavier cat, or a dry, ocular, or neurological case at a higher per kilogram dose, will need more medication and cost more across the same 84 days. Use this method only as a planning guide, and let your veterinarian set the final dose, strength, and vial count.

Are oral capsules an option, and how are they priced?

Yes. CureFIP Oral Capsules - Dual-Action Formula is an oral route priced at AU$139.00, combining GS-441524 with EIDD-1931, and dosed by weight band: under 2.5 kg uses GS-441524 25 mg plus EIDD-1931 5 mg; 2.5 to 5 kg uses GS-441524 35 mg plus EIDD-1931 8 mg; over 5 kg uses GS-441524 50 mg plus EIDD-1931 12 mg. The schedule is 1 capsule per day, every day, for a recommended 12 weeks.

The dual oral route is positioned for wet and dry FIP. Some regions note it is not recommended once ocular or neurological signs are present, or if your cat cannot eat or defecate. For those cases, talk to your veterinarian about the injectable protocol instead.

Weight band	GS-441524	EIDD-1931	Schedule
Under 2.5 kg	25 mg	5 mg	1 capsule/day
2.5 to 5 kg	35 mg	8 mg	1 capsule/day
Over 5 kg	50 mg	12 mg	1 capsule/day

For the number of capsules or bottles an 84-day course needs, check the current product page on curefipoceania.com and confirm with your veterinarian, since the per capsule dose stays fixed within each weight band.

How does success rate relate to the cost you pay?

GS-441524 has strong evidence behind it, which is what you are paying for. For GS-441524 monotherapy by injection, UC Davis reported a 92% success rate (Pedersen, 2019). For the dual antiviral approach combining GS-441524 with EIDD-1931, Li and Cheah (2025) reported 78.3% remission. These figures come from different protocols and should never be combined or averaged, so match the figure to the route you choose.

Across the CureFIP network, more than 100,000 cats have been treated since 2019. The cost of an 84-day course reflects daily antiviral dosing at a clinically defined per kilogram dose, plus the veterinary monitoring that supports a safe path to remission.

How can you keep FIP treatment costs predictable?

You can keep FIP treatment costs predictable by confirming your cat's exact weight and FIP form early, choosing the injectable strength that suits your cat's dose, and weighing your cat regularly so dosing stays accurate as treatment progresses. Cats often gain weight during recovery, and dosing follows weight, so plan for the dose to be reviewed across the 84 days.

Practical steps to manage cost:

1. Get a clear diagnosis and FIP form from your veterinarian, since the form sets the per kilogram dose.

2. Record your cat's current weight in kg so the daily dose and unit count can be estimated accurately.

3. Ask your veterinarian whether the 20 mg/ml or 30 mg/ml injectable suits your cat's weight, as a higher strength can mean fewer vials.

4. Budget for the full 84-day protocol up front rather than week to week.

5. Keep monitoring appointments, because catching changes early protects the outcome you are paying for.

FAQ

How much does FIP treatment cost for a cat in Australia?

The cost depends on your cat's weight, the FIP form, and the product. With CureFIP Oceania, GS-441524 Antiviral Injectable (20 mg/ml, 8ml) is AU$79.00, the 30 mg/ml, 8ml injectable is AU$99.00, and CureFIP Oral Capsules - Dual-Action Formula is AU$139.00. Your total is the number of units the 84-day protocol requires at your cat's prescribed dose, which your veterinarian confirms.

Why does the same FIP treatment cost more for some cats?

FIP dosing is calculated per kilogram, so a heavier cat uses more medication across the same 84 days. The form of FIP also matters, because wet FIP is dosed at 6 mg/kg, dry FIP at 8 mg/kg, and ocular and neurological FIP at 10 mg/kg, and higher doses cost more.

Is the injectable or the oral capsule cheaper?

The per unit prices differ: GS-441524 Antiviral Injectable starts at AU$79.00 per 8ml vial, while CureFIP Oral Capsules - Dual-Action Formula is AU$139.00. Which works out cheaper for your cat depends on weight, dose, and how many units the 84-day course needs, so confirm the unit count with your veterinarian.

How long does FIP treatment last in Australia?

A standard course runs 84 days (12 weeks) under veterinary supervision. The injectable schedule is 1 subcutaneous injection per day, 7 days a week, and the CureFIP oral capsule schedule is 1 capsule per day for a recommended 12 weeks.

How effective is GS-441524 for FIP?

For GS-441524 monotherapy by injection, UC Davis reported a 92% success rate (Pedersen, 2019). For the dual antiviral approach combining GS-441524 with EIDD-1931, Li and Cheah (2025) reported 78.3% remission. These figures come from different protocols and should not be combined.