Best FIP Medicine for Cats in India: A Pawrent's Guide

Key takeaway: The best FIP medicine for cats in India is GS-441524, the antiviral with a 92% success rate in the UC Davis clinical trial and more than 100,000 cats treated since 2019. The right BasmiFIP option for your cat depends on which form of Feline Infectious Peritonitis (FIP) your cat has, your cat's weight, and the stage of treatment. The path forward should always be chosen with your veterinarian.

Best FIP Medicine for Cats in India: A Pawrent's Guide

If your cat has just been diagnosed with FIP, take a breath. You are not the first Pawrent in India to face this, and your cat's odds are better than they have ever been. For years, FIP was considered hopeless. Since 2019, antiviral treatment with GS-441524 has changed that story for tens of thousands of families. This guide walks you through your options so you can talk to your veterinarian with confidence.

What is the best FIP medicine for cats in India?

The best FIP medicine for cats in India is GS-441524, the core antiviral in the BasmiFIP range, which achieved a 92% success rate in the UC Davis clinical trial. It is the most studied and most widely used FIP treatment in the world, with more than 100,000 cats treated since 2019. GS-441524 works against all four forms of FIP, which is why it is the foundation of nearly every recovery journey.

There is no single product that fits every cat. The right choice depends on the form of FIP, your cat's weight, and whether your cat is just starting treatment or already stable. BasmiFIP offers GS-441524 as an injectable, EIDD-1931 as an oral capsule for specific forms, and a combined Dual Antiviral capsule for later stages. Your veterinarian will help you match the product to your cat.

What are the four forms of FIP?

FIP has four forms: wet (effusive), dry (non-effusive), ocular, and neurological. Ocular and neurological FIP are two separate forms, not one combined category, and they often need a higher antiviral dose. Knowing the form your cat has is the single most important factor in choosing the right medicine.

• Wet (effusive) FIP: Fluid builds up in the belly or chest. Often the fastest to show signs.

• Dry (non-effusive) FIP: No fluid build-up, but inflammation forms in organs. Harder to spot early.

• Ocular FIP: The virus affects the eyes, causing color changes or cloudiness.

• Neurological FIP: The virus crosses into the nervous system, causing wobbliness, seizures, or behaviour changes.

A clear diagnosis comes first. Your veterinarian will use bloodwork, fluid analysis, and a physical exam to confirm FIP and identify the form. There is a clear path forward, and it starts with the right diagnosis.

Which BasmiFIP medicine is right for my cat's form of FIP?

The right BasmiFIP medicine depends directly on the form of FIP. GS-441524 injectable works for all four forms, while EIDD-1931 oral capsules are suitable only for wet and dry FIP. Ocular and neurological FIP should always begin with GS-441524 injections at a higher dose, because these forms need an antiviral that reliably reaches the eyes and nervous system.

Here is how the BasmiFIP options compare.

BasmiFIP option

Active ingredient

Best for

Key notes

Basmi FIP Antiviral (injectable)

GS-441524 (40 mg/ml, 99.4% purity, 8 ml vial)

All four forms, including ocular and neurological

Daily injection, 7 days a week, over the 84-day protocol

EIDD-1931 oral capsules

EIDD-1931 (15 mg per capsule, 60 per pack)

Wet and dry FIP only

Not for ocular or neurological FIP, or cats not eating or pooping normally

Dual Antiviral oral capsules

GS-441524 plus EIDD-1931

Stable cats after about 30 days of injections

One capsule per day; not during ocular or neurological symptoms

GS-441524 is dosed by form: 6 mg/kg for wet FIP, 8 mg/kg for dry FIP, and 10 mg/kg for both ocular and neurological FIP. EIDD-1931 is roughly 7.3 times more potent than GS-441524, which is why it is dosed in smaller amounts. Your veterinarian will calculate the exact dose for your cat's weight.

How do I choose between injections and oral capsules?

Injections of GS-441524 are the gold standard for starting treatment, especially for ocular and neurological FIP or any cat that is not eating or passing stool normally. Oral capsules can be a gentler option for wet and dry FIP, and many families switch to a capsule once their cat is stable. Both routes use the same trusted antivirals, so the choice is about your cat's form, stage, and comfort.

Here is the general regimen logic your veterinarian may follow:

1. Wet or dry FIP, no eye or nervous-system signs: You may start with EIDD-1931 oral capsules for 30 days. If symptoms persist, treatment can be extended. If they continue past 60 days, your veterinarian may switch to GS-441524 at 10 mg/kg.

2. Ocular or neurological FIP, or a cat not eating or pooping normally: Start with GS-441524 injections for 30 days. Once your cat is stable, your veterinarian may switch to the GS-441524 Dual Antiviral capsule.

A few important cautions on the Dual Antiviral capsule: it is used after about 30 days of injections or once the cat is stable. It should not be used during ocular or neurological symptoms, during vomiting or diarrhea, or for cats under one year of age with wet FIP. EIDD-1931 is potentially teratogenic, so no EIDD-1931 product (including the oral capsules and the Dual Antiviral) should be given to pregnant, nursing, or breeding cats. For those cats, talk to your veterinarian about GS-441524 injections instead.

What dose of EIDD-1931 capsules does my cat need?

EIDD-1931 oral capsules are dosed by weight, given every 12 hours, and are suitable only for wet and dry FIP. Each capsule contains 15 mg. The dosing follows simple weight bands so it is easy to follow at home alongside your veterinarian's guidance.

Cat weight

EIDD-1931 capsules (every 12 hours)

Under 2.5 kg

1 capsule

2.5 to 5 kg

2 capsules

Over 5 kg

3 capsules

The Dual Antiviral capsule is dosed once per day. For cats under 2.5 kg it provides GS-441524 25 mg plus EIDD-1931 5 mg, for 2.5 to 5 kg it provides GS-441524 35 mg plus EIDD-1931 8 mg, and for cats over 5 kg it provides GS-441524 50 mg plus EIDD-1931 10 mg. Always confirm the form and stage with your veterinarian before switching to any capsule.

How long does FIP treatment take?

The standard FIP protocol is 84 days, which is 12 weeks of continuous antiviral treatment. Skipping days or stopping early can allow the virus to return, so consistency over the full 84 days is what gives your cat the best chance at lasting remission. Treatment is a journey, and we will walk you through each stage alongside your veterinarian.

After the 84 days, most cats enter an observation period where your veterinarian monitors bloodwork and symptoms to confirm remission. Many families find that watching their cat regain weight, energy, and appetite during these weeks is the most reassuring part of the whole journey.

How well does GS-441524 work for FIP?

GS-441524 achieved a 92% success rate in the UC Davis clinical trial, which is the headline figure most often cited for the antiviral. In a separate field study of the dual antiviral combining GS-441524 with EIDD-1931, Li and Cheah (2025) reported a 78.3% remission rate. These are two different studies measuring two different protocols, so they should never be combined into one number.

What these figures show together is simple: FIP is now a treatable disease for most cats when caught and managed properly. Since 2019, more than 100,000 cats have been treated, and the success rate speaks for itself. Your veterinarian can help set realistic expectations based on your cat's form, age, and overall health.

Are there medicines or products to avoid during FIP treatment?

Yes. During FIP treatment, you should avoid fluoroquinolone antibiotics, spot-on flea medications, lysine, and immune boosters, as these can interfere with antiviral therapy or your cat's recovery. Always give your veterinarian a full list of every product your cat is taking before treatment begins.

Supportive nutraceuticals can have a role, but only as adjunct organ support, never as antivirals. BasmiFIP offers two from the RX Sciences range:

• LiverRx (cats and small dogs): Contains SAMe 90 mg, Silybin A+B (milk thistle) 9 mg, Vitamin E 13 mg, and Vitamin C 10 mg, in a 30-tablet pack. Supports liver health during treatment.

• KidneyRx (cats and dogs): Contains magnesium carbonate 10 mg, Vitamin D 50 IU, calcium carbonate 15 mg, L-Carnitine 25 mg, chitosan 25 mg, Omega-3 50 mg, and cranberry extract 25 mg, in a 60-tablet pack. Supports kidney health during treatment.

LiverRx and KidneyRx do not treat FIP and are not antivirals. They are organ-support tablets used alongside veterinary-guided antiviral treatment. Ask your veterinarian whether they fit your cat's plan.

What should I do first if I think my cat has FIP?

The first step is to see your veterinarian for a proper diagnosis, because the form of FIP decides which medicine and dose your cat needs. Once FIP and its form are confirmed, you can choose the right BasmiFIP antiviral and begin the 84-day protocol with confidence.

1. Book a veterinary visit and ask for bloodwork and, if there is fluid, a fluid analysis.

2. Confirm the form of FIP: wet, dry, ocular, or neurological.

3. Discuss the right antiviral and starting dose with your veterinarian.

4. Begin daily treatment and keep a simple log of weight, appetite, and energy.

5. Stay consistent for the full 84 days and attend follow-up checks.

You can learn more about each option at basmifipindia.com, then bring your questions to your veterinarian. You do not have to figure this out alone.

FAQ

Which FIP medicine is best for cats in India?

GS-441524 is widely considered the best FIP medicine, with a 92% success rate in the UC Davis clinical trial and more than 100,000 cats treated since 2019. The exact BasmiFIP product depends on your cat's form of FIP, weight, and treatment stage, which your veterinarian will help you choose.

Can I treat ocular or neurological FIP with oral capsules?

Ocular and neurological FIP should start with GS-441524 injections at 10 mg/kg, not EIDD-1931 oral capsules, which are suitable only for wet and dry FIP. Once your cat is stable after about 30 days, your veterinarian may consider switching to the GS-441524 Dual Antiviral capsule.

How long is the FIP treatment course?

The standard FIP protocol is 84 days, which is 12 weeks of daily antiviral treatment. Staying consistent for the full course gives your cat the best chance at lasting remission, followed by an observation period your veterinarian will guide.

Is FIP treatment safe for pregnant or nursing cats?

EIDD-1931 is potentially teratogenic, so no EIDD-1931 product should be given to pregnant, nursing, or breeding cats. If your cat is in any of these groups, talk to your veterinarian about GS-441524 injections as the alternative.

Do LiverRx and KidneyRx treat FIP?

No. LiverRx and KidneyRx are supportive nutraceuticals for liver and kidney health, not antivirals, and they do not treat FIP. They are used only as adjunct support alongside veterinary-guided antiviral treatment.