Where to Buy Legitimate GS-441524 for FIP in the US

You can buy legitimate GS-441524 for Feline Infectious Peritonitis (FIP) in the United States directly from CureFIP at curefipusa.com, which lists exact strengths, prices, and per-form dosing and has supported the treatment of 100,000+ cats since 2019. A legitimate source shows you the concentration in mg/ml, matches the dose to the form of FIP, and asks you to treat under veterinary supervision. Below is how to recognize a trustworthy supplier and how CureFIP structures its GS-441524 protocol.

A cat resting comfortably at home.

Where can you buy legitimate GS-441524 for FIP in the US?

In the US, you can buy legitimate GS-441524 for FIP directly from CureFIP at curefipusa.com, where every product lists its exact strength, volume, price, and per-form dose. GS-441524 is the antiviral at the core of modern FIP treatment, and it is the hero ingredient of the CureFIP range.

CureFIP has supported the treatment of 100,000+ cats since 2019. That scale matters because it means the protocol, the dosing structure, and the customer guidance have been used across wet, dry, ocular, and neurological FIP cases many times over.

If you have just received a diagnosis and feel overwhelmed, our guide on what to do if your US vet suspects FIP walks you through the first steps calmly and in order.

What makes a GS-441524 source legitimate?

A legitimate GS-441524 source states the concentration in mg/ml, publishes the price in plain USD, and gives a dose that matches the form of FIP your cat has. Vague labels, missing concentrations, and one-size-fits-all dosing are red flags.

Use this checklist when you compare providers:

• Stated concentration. The label should show mg/ml, for example 15 mg/ml, 20 mg/ml, 30 mg/ml, or 40 mg/ml, so you and your veterinarian can calculate volume accurately.

• Transparent pricing. Prices should be listed clearly and never require conversion or guesswork.

• Form-specific dosing. A serious provider doses by FIP form (wet, dry, ocular, neurological), not a single blanket number.

• A named clinical reference. CureFIP dosing references Pedersen et al., UC Davis (PMC6435921).

• Veterinary supervision built in. The provider should expect you to work with your veterinarian, not around them.

We are clear about what the data shows and what it does not, and we publish the numbers so you can check them. For more on why the number printed on a label is only part of the story, see our explainer on what the label number really means.

How does CureFIP structure its GS-441524 treatment?

CureFIP structures GS-441524 treatment as a standard 84-day protocol, given as one subcutaneous injection per day, seven days a week, for 12 weeks. The daily dose is set by the form of FIP and your cat's weight, and treatment runs under veterinary supervision.

The goal of the full 84-day protocol is remission. Completing the entire course, rather than stopping when your cat looks better, is central to how the protocol is designed to work.

Monitoring is part of the plan. Regular bloodwork helps your veterinarian track progress, and our guide to your cat's blood work during FIP treatment explains what those numbers are telling you.

Which GS-441524 injectable strength and price is right for your cat?

The right GS-441524 injectable strength depends on your cat's weight and the daily dose your veterinarian calculates, because a higher concentration delivers the same dose in a smaller injection volume. CureFIP offers several strengths at set prices, listed below exactly as they appear in the catalog.

Product	Strength	Volume	Price
GS-441524 Antiviral Injectables	15 mg/ml	8ml	$49.00
GS-441524 Antiviral Injectables	20 mg/ml	8ml, 10ml	$69.00
GS-441524 Antiviral Injectables	30 mg/ml	8ml, 10ml	$89.00
GS-441524 Antiviral Injectables	40 mg/ml	8ml, 10ml	$119.00
GS-441524 Antiviral with Vitamin B12	20 mg/ml + B12 50mcg/ml	8ml, 10ml	$75.00
GS-441524 Antiviral with Vitamin B12	30 mg/ml + B12 50mcg/ml	8ml, 10ml	$95.00

The two Vitamin B12 options combine GS-441524 with added B12, which some caregivers use for cats needing extra support. Your veterinarian can advise which strength best fits your cat's weight band and comfort during daily injections.

How is GS-441524 dosed for the four forms of FIP?

GS-441524 is dosed by the form of FIP, and there are four forms: wet, dry, ocular, and neurological. Each form has its own daily dose in mg/kg, given as one subcutaneous injection per day, seven days a week, for 84 days, referencing Pedersen et al., UC Davis (PMC6435921).

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

Wet / Effusive FIP

Wet FIP is the effusive form, marked by fluid buildup in the abdomen or chest that can cause a swollen belly or labored breathing. The CureFIP injectable dose for wet FIP is 6 mg/kg once daily for 84 days.

Because fluid accumulation can progress quickly, prompt diagnosis and a fast treatment start matter. Your veterinarian confirms the form before dosing begins.

Dry / Non-effusive FIP

Dry FIP is the non-effusive form, which produces little or no fluid and instead causes inflammatory lesions in organs, along with signs like weight loss, fever, and lethargy. The CureFIP injectable dose for dry FIP is 8 mg/kg once daily for 84 days.

Dry FIP can be harder to diagnose because its signs are subtle. Some feline viruses show few early symptoms, a pattern we cover in our piece on silent feline viruses.

Ocular FIP

Ocular FIP affects the eyes, causing changes such as color shifts in the iris, cloudiness, or inflammation. The CureFIP injectable dose for ocular FIP is 10 mg/kg once daily for 84 days.

The higher dose reflects the need for the antiviral to reach the eye effectively. Any new eye changes should be reported to your veterinarian without delay.

Neurological FIP

Neurological FIP affects the nervous system and can cause wobbliness, seizures, or behavioral changes. The CureFIP injectable dose for neurological FIP is 10 mg/kg once daily for 84 days.

The nervous system is harder for antivirals to reach, which is why neurological FIP uses the higher 10 mg/kg dose. Close veterinary monitoring is especially important with this form.

What about oral GS-441524 options in the US?

CureFIP also offers oral options, including Cure FIP™ Oral Capsules at $129.00 and EIDD-1931 Oral Capsules at $39.00, dosed by weight band and taken daily. Oral routes suit some households and cats, and your veterinarian can help you decide between injectable and oral treatment.

Cure FIP™ Oral Capsules combine GS-441524 with EIDD-1931 and are dosed by weight: under 5.5 lb uses GS-441524 25 mg + EIDD-1931 5 mg; 5.5 to 11 lb uses GS-441524 35 mg + EIDD-1931 8 mg; and over 11 lb uses GS-441524 50 mg + EIDD-1931 12 mg, taken as one capsule per day for a recommended 12 weeks.

The oral dual route is positioned for wet and dry FIP. Some regions note it is not recommended once ocular or neurological signs are present, or if the cat cannot eat or defecate.

EIDD-1931 Oral Capsules are dosed at 1 capsule (15 mg) per 2.5 kg body weight every 12 hours, with 60 capsules per bottle and a standard 60-day course. They are not for ocular or neurological cases, or for cats not eating or defecating, and EIDD-1931 is teratogenic, so it must not be used in pregnant or lactating queens. To understand how the two antivirals work together, read why dual antiviral capsules make treatment stronger.

How effective is GS-441524 for FIP?

GS-441524 monotherapy has a 92% success rate reported by UC Davis (Pedersen, 2019), which is why it sits at the core of modern FIP treatment. Separately, a dual antiviral protocol combining GS-441524 and EIDD-1931 reported 78.3% remission in previously relapsed cats (Li and Cheah 2025).

These two figures apply to two different protocols and should never be blended. The 92% figure describes GS-441524 injectable monotherapy, while the 78.3% figure describes the dual antiviral approach in a specific relapsed population.

For a deeper look at the evidence, see our overview of how effective GS-441524 treatment is for FIP and the new study on the dual antiviral protocol in relapsed cats.

How do you start GS-441524 treatment safely?

You start GS-441524 treatment safely by confirming the diagnosis with your veterinarian, identifying the form of FIP, calculating the weight-based dose, and committing to the full 84-day course under supervision. Skipping the diagnosis or stopping early undermines the protocol.

1. Confirm the diagnosis. Ask your veterinarian to confirm FIP and identify whether it is wet, dry, ocular, or neurological.

2. Weigh your cat accurately. Dosing is by mg/kg, so an accurate weight is essential.

3. Choose the product and strength. Match the concentration to your cat's dose and comfort with your veterinarian's input.

4. Follow the schedule. Give one injection per day, seven days a week, for the full 84 days.

5. Monitor with bloodwork. Recheck regularly so your veterinarian can track progress toward remission.

For a broader walkthrough of treatment in the US, our complete FIP treatment FAQ guide answers the questions caregivers ask most.

FAQ

Where is the safest place to buy GS-441524 for FIP in the US?

The safest sources publish exact concentrations in mg/ml, list clear USD prices, dose by FIP form, and expect veterinary supervision. CureFIP at curefipusa.com meets these criteria and has supported the treatment of 100,000+ cats since 2019.

How much does GS-441524 cost?

CureFIP GS-441524 Antiviral Injectables are listed at $49.00 for 15 mg/ml, $69.00 for 20 mg/ml, $89.00 for 30 mg/ml, and $119.00 for 40 mg/ml. Vitamin B12 versions are $75.00 for 20 mg/ml and $95.00 for 30 mg/ml, and Cure FIP™ Oral Capsules are $129.00.

How long does GS-441524 treatment take?

The standard GS-441524 protocol runs 84 days (12 weeks), given as one subcutaneous injection per day, seven days a week, under veterinary supervision. Completing the full course is important, even if your cat improves earlier.

What dose of GS-441524 does my cat need?

The injectable dose is set by FIP form: 6 mg/kg for wet, 8 mg/kg for dry, and 10 mg/kg for ocular and neurological, referencing Pedersen et al., UC Davis (PMC6435921). Your veterinarian calculates the exact daily amount from your cat's weight.

Can I use oral GS-441524 instead of injections?

CureFIP offers Cure FIP™ Oral Capsules at $129.00, dosed by weight band, positioned for wet and dry FIP. They are not recommended once ocular or neurological signs are present, or if the cat cannot eat or defecate, so discuss the right route with your veterinarian.

If your cat has just been diagnosed, you do not have to navigate this alone. We invite you to explore the GS-441524 treatment options at CureFIP USA and to talk with our team and your own veterinarian about the plan that fits your cat best.