FIP is no longer the end. Your cat still has a chance.

Pharmacy-grade GS-441524, veterinarian-guided through the full 84-day course.

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87,000+Cats treated worldwide
87%Documented recovery rate
42Countries served
5Regional clinics
§ 01 — Clinical results

Visible improvement within one week.

Most owners see the first signs of recovery — appetite return, fever resolution — by day seven. Below is the typical clinical trajectory observed across thousands of documented cases.

DAY 1
Treatment begins First oral tablet administered. Dosing schedule established by weight.
DAYS 3–5
Fever subsides Body temperature returns toward normal. Lethargy begins to lift.
DAYS 7–14
Visible improvement Appetite returns, energy increases, weight stabilises. Effusion begins reabsorbing.
DAY 84
Treatment complete Full 84-day course finished. Observation period begins.
7–14days
Visible improvement

Appetite, energy, and fever resolution typically within two weeks of starting treatment.

99%
Recovery rate, early stage

Up to 99% sustained recovery in early and mid-stage cases when treatment begins promptly.

0serious
Side effects at standard dose

High tolerability at appropriate dosing. Mild adjustments resolve within the first week.

§ 02 — Choose your formulation

Two products. Both GS-441524.

Oral tablets for at-home administration. Injectable for faster onset in acute cases. Same clinically validated active ingredient, two delivery routes.

VETRYX GS-441524 ORAL TABLETS 20 mg × 12 per tablet · tablets
ORAL · NON-INVASIVE

Dual Oral Course

20 mg × 12 per bottle

Oral GS-441524 + EIDD-1931 c…

From $1,090.00
View product →
VETRYX GS-441524 INJECTABLE 30 mg/mL
INJECTABLE · ACUTE PHASE

Injectable Standard

30 mg/mL · 5 mL vial

Subcutaneous GS-441524, dose…

From $890.00
View product →
§ 03 — Why it works

Four reasons GS-441524 works.

i.

Feline-optimised formula

Cat-specific enhanced GS-441524. Higher bioavailability, gentler tolerability.

ii.

Scientifically proven

Global first-line treatment for Feline Infectious Peritonitis since 2018.

iii.

Oral & non-invasive

No injections. Tablets given directly or hidden in food.

iv.

Effective against relapse

Works for cats relapsing after injections or other treatments.

§ 04 — How it works

From order to treatment, in three steps.

No prescriptions to chase. Use the dosage calculator, place your order, and begin treatment within days.

i.

Calculate dosage

Use the dosage calculator on the product page. Enter your cat's weight and FIP type — wet, dry, or neurological — and you'll see the daily milligrams, tablets per day, and bottles needed for a full course.

2 MIN
ii.

Place order

Choose your plan and check out. Orders are dispatched from our nearest warehouse within 8 hours of confirmation. Express 1–2 day air shipping is available at checkout.

8 HRS
iii.

Begin treatment

Once the package arrives, give one tablet daily — directly or hidden in food. Treatment specialists are available by email and chat seven days a week if you need guidance.

DAY 1
A patient story

Mochi was given three weeks.

My vet had told us to prepare for the end. Mochi was eating again on day six. By week four she was chasing the laser pointer. Vetryx gave us the years we never thought we'd have.

Mochi was four when she stopped eating. Her abdomen was distended within a week, and the local clinic — kind, careful — had no further options. The diagnosis came back wet-form FIP on a Friday. We started her on injectable GS-441524 the following Tuesday.

Hana T.
Tokyo, Japan · treated August 2023
Verified case
Day 6
Eating again
Wk 4
Playing again
2y
Cleared at follow-up
§ 06 — Research advisors

Backed by veterinary research, not algorithms.

Our GS-441524 oral tablets are formulated and validated by board-certified veterinarians across PetVital's research network — 16 centres across Asia and Europe with over fifty years of feline-disease expertise.

EC
Dr. Elena ChenInternal Medicine · 11 years
DVM · CA
RS
Dr. Rafael SantosFeline Specialty · 9 years
DVM · DE
YK
Dr. Yuki KobayashiDiagnostic Imaging · 14 years
DVM · JP
AM
Dr. Aisha MansourGCC Region Lead · 8 years
DVM · AE
Our guarantee
50% off retreatment

If your cat relapses within twelve months, we cover half the next course.

It happens in fewer than four percent of completed cases. When it does, we apply a 50% credit to your reorder — no paperwork, no claims process.

Read terms
§ 07 — Common questions

The questions worth asking.

i. Is GS-441524 actually safe for cats?
Yes. GS-441524 has been studied extensively in feline patients since 2018, with peer-reviewed safety data published by UC Davis, the Journal of Feline Medicine and Surgery, and several international veterinary journals. Side effects are uncommon and usually limited to mild injection-site irritation. Every Vetryx course is overseen by a licensed veterinarian who monitors blood markers throughout treatment.
ii. How quickly will my cat show improvement?
Most cats show appetite return and fever resolution within five to seven days. Effusion typically begins reabsorbing in the second week. Full clinical recovery is measured at twelve weeks (84 days), with a further twelve weeks of observation before we declare the case closed.
iii. Do I need a veterinarian's prescription before ordering?
We work alongside your local veterinarian wherever possible. If your clinic is unfamiliar with GS-441524, our consulting DVMs can assume primary clinical responsibility under telemedicine frameworks recognised in your jurisdiction. We'll walk your local vet through the protocol on request.
iv. Injectable or oral — which is right for my cat?
Injectable formulations have a longer track record and are typically preferred for severe or neurological cases where dose precision matters most. Dual oral capsules are increasingly chosen for stable wet- and dry-form cases — particularly for fearful cats, senior cats, or single-owner households. Your assigned DVM will recommend the right route after reading your bloodwork.
v. How does shipping work to my country?
Vetryx dispatches via cold-chain courier from regional centres in the US, Germany, Japan, Korea, and the UAE. Most destinations receive their first month's supply within 48–72 hours of order confirmation. Customs documentation and import compliance are handled end-to-end by our logistics team.
vi. What does the relapse guarantee actually cover?
If your cat completes a full 84-day course and shows confirmed FIP relapse within twelve months, Vetryx covers 50% of the cost of the retreatment course. Eligibility requires confirmation by your assigned DVM and original course completion records — both of which we hold on file. Less than 4% of cases require it.
vii. What happens if my cat doesn't respond to treatment?
A small percentage of cases require dose adjustment, route switching (oral to subcutaneous), or extension into a 112-day protocol. We refund the unused balance of any course discontinued by clinical decision, and we publish failure rates quarterly without redaction.

Begin treatment today.

FIP moves quickly. Every order is dispatched within 8 hours, with express 1–2 day air shipping available — so treatment can begin within days.

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