PetFIP is one of the most important stories in cat medicine right now. Caused by a mutation of a common feline coronavirus, it was — until just a few years ago — a near-certain death sentence, especially in kittens. That has changed: antiviral drugs in the GS-441524 family now cure a large share of cats, and access in Canada has been improving as legitimate treatment pathways open up. The catch is cost and the still-evolving supply. Here's an honest picture.
What it costs in Canada
| Scenario | Typical cost (CAD) |
|---|---|
| Diagnostics (bloodwork, imaging, fluid analysis) | ~$300–$1,200 |
| Antiviral course (GS-441524 class, ~12 weeks) | ~$1,500–$6,000+ (scales with the cat's weight) |
| Monitoring bloodwork during treatment | ~$400–$1,200 over the course |
| Hospitalization / supportive care (severe cases) | ~$1,000–$3,000+ |
| Post-treatment observation period rechecks | ~$150–$500 |
| Typical all-in course | ~$2,000–$8,000+ |
These figures are estimates for general guidance only, not quotes, and this is a fast-moving area — pricing and drug access in Canada are still evolving. The single biggest cost driver is the antiviral itself, and because the dose is weight-based, a large adult cat costs considerably more to treat than a kitten. The form of FIP (the 'wet'/effusive form versus 'dry', and whether the eyes or nervous system are involved) also affects the dose and length of treatment. Always work with a veterinarian — ideally one experienced with FIP — for an accurate, current estimate. See How we estimated these costs.
With insurance vs paying out of pocket
| Scenario | You pay | Insurer pays |
|---|---|---|
| No insurance | Full $2,000–$8,000+ course | $0 |
| Comprehensive policy (in force before symptoms) | Deductible + co-insurance share | May cover diagnostics, treatment, and monitoring — up to limits |
| Newer antiviral drugs specifically | Possible out-of-pocket if the drug isn't a covered item | Varies by insurer — confirm coverage of GS-441524-class therapy |
| No policy until after diagnosis | Full cost — FIP is pre-existing to any new policy | $0 |
FIP went from a death sentence to often curable
For decades, an FIP diagnosis meant preparing to say goodbye. That changed with antiviral drugs in the GS-441524 family, which now cure a large proportion of treated cats over a roughly 12-week course. It's genuinely one of the biggest breakthroughs in feline medicine. The treatment isn't trivial — it's weeks of daily medication, monitoring, and cost — but for the first time, most families have a real, hopeful option rather than none.
Why the cost varies so much
Three things drive the number. First, the antiviral itself is the bulk of the bill, and the dose is weight-based — a hefty adult cat needs much more drug than a kitten, so it costs more to treat. Second, the form of FIP matters: cases involving the eyes or nervous system typically need a higher dose. Third, diagnostics and monitoring — confirming FIP isn't always simple, and bloodwork through the course adds up. A straightforward kitten case sits at the lower end; a large cat with neurological involvement sits much higher.
Access in Canada is improving — talk to a vet
Access to GS-441524-class treatment in Canada has been evolving quickly, with more legitimate veterinary pathways opening up. Because the situation and pricing keep changing, the right move is to work with a veterinarian experienced with FIP (often a feline specialist or internal-medicine vet), who can confirm the diagnosis, source the treatment properly, and give you a current, accurate cost. Avoid unregulated sources; a vet-guided course is safer and gives your cat the best odds.
Does FIP treatment cost vary by city?
The medication cost is fairly consistent, but access to FIP-experienced vets and specialists is concentrated in major metros (Toronto, Vancouver, Calgary, Ottawa, Montreal) and university veterinary schools. Families in smaller centres may travel to a referral practice for diagnosis and to start treatment, then continue with their local vet. The drug dominates the bill either way; the city mostly affects how far you travel for specialist guidance.
How insurance covers FIP
Comprehensive (accident-and-illness) pet insurance generally covers FIP as an illness — the diagnostics, treatment, and monitoring — provided it wasn't pre-existing before your policy started. Two cautions specific to FIP: because it most often strikes kittens and young cats, insuring early (before any symptoms) is what makes coverage possible; and because the antiviral is a newer therapy, it's worth confirming with your insurer that GS-441524-class treatment is a covered item rather than assuming. Enrolling a healthy kitten is the single best way to keep this option affordable. See best pet insurance in Canada and our kitten first-year cost guide.
How we estimated these costs
The dollar figures here are estimates for general guidance, not quotes, compiled from publicly available Canadian sources in a fast-changing area — confirm current pricing and drug access with a veterinarian experienced in FIP. Sources we drew on:
- Canadian FIP diagnostic and treatment cost ranges: our Canadian Vet Cost Index, compiled from publicly available Canadian pricing.
- Related feline diagnostic and hospitalization context from our hospitalization cost guide.
Considering insurance?
A full FIP antiviral course can run $2,000–$8,000+ — and FIP most often strikes kittens, before many owners have thought about insurance. A comprehensive policy taken out while your cat is healthy can cover a diagnosis like this. Insure a healthy kitten and compare Canadian plans.