FIP Treatment Cost UK 2026: Full Price Breakdown

Worried your cat has Feline Infectious Peritonitis (FIP) and trying to work out what treatment will actually cost? You are not alone. Cost is one of the first questions UK caregivers ask after a FIP diagnosis, and the honest answer is that timely, GS-441524 based antiviral treatment is the single biggest factor in your cat's recovery chances. This 2026 guide breaks down the FIP treatment cost in the UK, line by line, so you can plan quickly and start the 84-day antiviral protocol without losing critical days.

FIP Treatment Cost UK 2026: Full Price Breakdown

CureFIP™ is built around GS-441524, the molecule shown by Dr. Niels Pedersen and the UC Davis team to drive a 92% success rate in cats with FIP when used as injectable monotherapy (Pedersen et al., 2019). More than 100,000+ cats have been treated through the CureFIP™ network since 2019. Below, you will see exactly what UK owners pay, where the money goes, and how to keep costs predictable from week one to week twelve.

Why FIP Treatment Cost Is the First Question UK Owners Ask

FIP was considered fatal for decades. Today, with GS-441524 based antivirals, recovery is realistic, but the 84-day protocol is intensive and the bill adds up across three months. UK owners typically face four cost categories:

1. The antiviral medication itself (GS-441524, sometimes combined with EIDD-1931).

2. Diagnostic workup (bloods, imaging, fluid analysis).

3. Vet-administered procedures and monitoring bloodwork during the 12 weeks.

4. Supportive care (appetite stimulants, fluids, organ support where indicated).

Understanding each bucket helps you budget realistically and avoid the most expensive mistake of all: delaying treatment. Early intervention, within the first 1 to 2 weeks of symptom onset, makes the difference between a straightforward 84-day course and a complicated case requiring dose escalation.

The Core Cost: GS-441524 Price in the UK (2026)

The antiviral is the single largest line item. CureFIP™ offers three injectable strengths and a dual oral capsule, so owners can match the presentation to their cat's weight, FIP type, and home-care setup.

CureFIP™ GS-441524 Injectable 20mg/ml, €79.00

The entry strength, available in 8ml and 10ml vials. Suitable for smaller cats and kittens because the lower concentration makes precise dosing easier.

CureFIP™ GS-441524 Injectable 30mg/ml, €89.00

The most commonly used concentration for average-sized adult cats with wet or dry FIP. Available in 8ml and 10ml vials.

Cure FIP Antiviral 40mg/ml, €119.00

The higher concentration option, useful for larger cats and for ocular or neurological FIP where the per-kg dose is higher and injection volume needs to stay manageable. Available in 8ml and 10ml vials.

All three injectables follow the same schedule: 1 subcutaneous injection per day, 7 days per week, for 12 weeks (84 days). Dosing is by FIP type: wet 6 mg/kg, dry 8 mg/kg, ocular 10 mg/kg, neurological 10 mg/kg (reference: Pedersen et al., UC Davis, PMC6435921).

CURE FIP™ Dual Antiviral Oral Capsules, €179.00

For owners who cannot inject daily, the dual oral route combines GS-441524 with EIDD-1931 in one capsule. Dosing is by weight band:

• 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

Schedule is 1 capsule per day, every day, for 12 weeks. The dual oral protocol is associated with a 78.3% remission rate (Li and Cheah, 2025). Note: the oral dual route is positioned for wet and dry FIP, and is generally not recommended once ocular or neurological signs are present, or if the cat cannot eat or defecate.

How Many Vials or Capsules Will You Actually Need?

This is where owners get caught out. Total medication cost depends on:

• Your cat's weight (heavier cats need more mg per day).

• The FIP type (neurological at 10 mg/kg uses more than wet at 6 mg/kg).

• Treatment duration (the standard is 84 days, but some cats need extension).

Because every cat is different, do not estimate vials yourself. A CureFIP™ advisor or your vet will calculate the exact 12-week supply based on the weight on the day you start. Order in phased batches if cash flow is tight, but never skip days, interruptions undermine the antiviral pressure on the virus and risk relapse.

Diagnostic Costs in the UK Before You Start

Before the first injection, your vet will confirm the diagnosis. Typical UK diagnostics include:

• Full blood panel with biochemistry, looking at globulins, ALT, A/G ratio and SDMA.

• Abdominal or thoracic ultrasound, especially if effusion is suspected.

• Fluid tap and analysis for wet FIP (Rivalta test, protein, cytology).

• PCR or immunostaining on effusion or tissue in difficult cases.

UK vet practices vary widely on price. A general practice workup is typically more affordable than a referral hospital, but a referral may be needed for neurological or ocular FIP where MRI or CSF analysis is on the table. Ask for an itemised estimate before agreeing.

Monitoring Bloodwork During the 84-Day Protocol

You do not just inject and wait. Monitoring is what tells you the treatment is working. CureFIP™ recommends bloodwork at baseline, then roughly every 3 to 4 weeks during the 12 weeks. Caregivers watch:

• Globulins trending down from elevated baseline.

• A/G ratio normalising above 0.6 to 0.8.

• ALT returning toward normal as liver inflammation resolves.

• SDMA and creatinine for kidney function.

• Haematocrit recovering from anaemia.

Budget for at least three to four monitoring panels during treatment, plus an 84-day post-treatment observation panel. Bloodwork is non-negotiable. It is how you confirm the antiviral is winning, week by week.

Supportive Care and Adjunct Costs

Some cats need extras. Common UK supportive line items include:

• Appetite stimulants (mirtazapine, capromorelin).

• Subcutaneous fluids if dehydrated.

• Anti-nausea medication.

• Ophthalmic drops for ocular FIP.

• Nutraceutical organ support during recovery, used only as optional adjunct, never as a FIP treatment.

These are usually small line items individually but can add up across 12 weeks. Build a 10 to 15% contingency into your overall budget.

A Realistic 2026 UK Budget Framework

Rather than quoting a single national average (which would mislead, because weight and FIP type drive the total), here is the framework UK owners should use:

1. Diagnostics, week 0. Bloods, imaging, fluid analysis. Get an itemised vet estimate.

2. Antiviral medication, weeks 1 to 12. Choose the CureFIP™ presentation that matches your cat's weight and FIP type using the catalog prices above (€79.00, €89.00, €119.00, or €179.00 per unit). Multiply by the supply your vet calculates for 84 days.

3. Monitoring bloodwork, every 3 to 4 weeks. Three to four panels minimum.

4. Supportive care, ongoing. 10 to 15% contingency.

5. Post-treatment observation, weeks 13 to 24. One confirmatory blood panel at 84 days post-treatment to confirm sustained remission.

This structure keeps surprises to a minimum and lets you phase spend across three months rather than facing one enormous upfront bill.

Injectable vs Oral: Which Costs Less Over 84 Days?

UK owners often ask whether the dual oral capsules work out cheaper than daily injections. The honest answer is: it depends on your cat's weight, the FIP type, and how comfortable you are with subcutaneous injections at home.

• Injectables (20, 30 or 40 mg/ml) are the gold-standard route, backed by the 92% success rate from GS-441524 monotherapy in the UC Davis dataset. They are the recommended choice for ocular and neurological FIP at 10 mg/kg.

• CURE FIP™ Dual Antiviral Oral Capsules at €179.00 offer convenience for wet and dry FIP in households where daily injections are not feasible. Remission rate with the dual antiviral protocol is 78.3% (Li and Cheah, 2025).

Neither route is universally cheaper. Speak to a CureFIP™ advisor or your vet for a per-cat calculation rather than guessing.

Why Acting Fast Makes the Difference (Including Financially)

Delayed treatment costs more, not less. Cats who start GS-441524 later often present with:

• Severe anaemia requiring transfusion.

• Hepatic and renal compromise requiring hospitalisation.

• Neurological progression requiring the higher 10 mg/kg dose, which means more vials.

• Effusion volumes needing drainage.

Every one of those is a bigger bill than starting clean at the first sign of disease. Early intervention, within the first 1 to 2 weeks, is both clinically and financially the right call.

How to Order CureFIP™ in the UK

UK owners can order CureFIP™ directly through curefip.com. Prices are listed in EUR exactly as shown above. Shipping to the UK is standard, and the CureFIP™ team can help you select the right strength and quantity based on your vet's diagnosis and your cat's current weight. Veterinary supervision throughout the 84-day protocol is essential, your vet should oversee dosing, monitoring bloodwork, and any dose adjustments.

FAQ

How much does FIP treatment cost in the UK in total?

There is no single national figure, because total cost depends on your cat's weight, the FIP type (wet, dry, ocular, or neurological), and the CureFIP™ presentation you choose. Use the framework above: diagnostics plus 84 days of antiviral medication at catalog prices (€79.00, €89.00, €119.00, or €179.00 per unit), plus three to four monitoring blood panels, plus a 10 to 15% supportive care contingency.

What is the GS-441524 price in the UK from CureFIP?

CureFIP™ GS-441524 Injectable 20mg/ml is €79.00, the 30mg/ml is €89.00, and Cure FIP Antiviral 40mg/ml is €119.00. The CURE FIP™ Dual Antiviral Oral Capsules, which combine GS-441524 with EIDD-1931, are €179.00. Vials come in 8ml and 10ml.

Is the oral dual capsule cheaper than injections over 84 days?

Not necessarily. The per-unit price is higher, but daily dosing logistics and the absence of injection supplies differ. Your total depends on weight band and FIP type. Ask a CureFIP™ advisor or your vet to calculate the 12-week supply for your specific cat before deciding.

Can I use the oral capsules for ocular or neurological FIP?

The dual oral route is positioned for wet and dry FIP and is generally not recommended once ocular or neurological signs are present, or if the cat cannot eat or defecate. For those forms, the injectable route at 10 mg/kg is the standard. Discuss with your vet before switching protocols.

How long is the treatment and can I pay in stages?

The standard antiviral protocol is 12 weeks (84 days), followed by an 84-day observation period with a confirmatory blood panel. Many UK owners order medication in phased batches across the 12 weeks to spread cost, but you must never miss a daily dose. Continuous antiviral pressure is what drives remission.

What success rates should I expect?

GS-441524 injectable monotherapy is associated with a 92% success rate (Pedersen et al., UC Davis, 2019). The dual antiviral protocol with GS-441524 plus EIDD-1931 is associated with a 78.3% remission rate (Li and Cheah, 2025). More than 100,000+ cats have been treated through the CureFIP™ network since 2019. Early treatment, within the first 1 to 2 weeks of symptoms, gives your cat the best chance.