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FIP Help

About FIP

What is feline infectious peritonitis (FIP), and how is it treated?

Feline infectious peritonitis (FIP) is a serious viral disease caused by a mutation of feline coronavirus (FCoV). It can lead to widespread inflammation in the cat’s body—most commonly in the abdomen, chest, brain, or eyes.

Every cat’s experience with FIP is unique, but no matter where you are in the journey, FIP deeply affects both the pet and their human companion. Thankfully, with the introduction of NeoFipronis® (Pronidesivir), FIP is no longer untreatable.

— Noah, cat parent and FIP survivor story

Treating Your Cat’s FIP

Advantages of NeoFipronis®(Pronidesivir) in Treating Feline Infectious Peritonitis (FIP)

Painless Oral Administration

Painless Oral Administration: NeoFipronis®(Pronidesivir) comes in tablet form—no daily injections needed—reducing stress and discomfort for your cat and making treatment easier for pet owners.

Scientifically Formulated, Clinically Proven

Scientifically Formulated, Clinically Proven: Designed for high bioavailability and fast absorption, NeoFipronis®(Pronidesivir) is effective against all FIP types (wet, dry, neurological, ocular), delivering reliable and measurable outcomes.

Most cats diagnosed with feline infectious peritonitis (FIP) show significant improvement when treated with NeoFipronis®(Pronidesivir), an oral medication specifically formulated for consistent daily use, offering a non-invasive, stress-free treatment option that supports long-term disease management and greatly increases the chances of full recovery.

As your cat’s condition evolves, the treatment plan may need to adjust

Working closely with your veterinarian ensures better outcomes. When discussing the best path forward, consider these factors:

Injection needle

Easy to give: Oral tablets, no injections

Lifestyle

At-home care: No clinic visits needed

Safety

Safe: Low risk of side effects

Attack prevention

Effective: Relieves symptoms, supports recovery

Rescue therapy

Prevents relapse: Helps maintain remission

— Lynn, cat owner

Don’t be afraid to advocate for your cat’s FIP care

Every cat is different—and so is every FIP diagnosis. As the one who knows your cat best, you play a vital role in helping them get the right treatment.

Talk with your vet about these important factors when planning care with NeoFipronis®(Pronidesivir):

Mother and child illustration

FIP type
Wet, dry, neurological, or ocular—each needs tailored support

School-age girl

Treatment start time
Early intervention can improve outcomes

Elderly couple

Weight and dosage
Accurate weight means accurate medication

Logging information

Home care environment
Quiet, stress-free space helps recovery

Adult reading

Ease of administration
Oral tablets simplify long-term use

C1 esterase inhibitor level

Previous treatment history
Helps avoid relapse or underdosing

— A caregiver who saved her cat from FIP

Ready to get started?

Oral administration
What is FIP?
Real HAE patient stories
Treatment Guide

INDICATION AND IMPORTANT SAFETY INFORMATION

WHAT IS NEOFIPRONIS® (Pronidesivir)?

NeoFipronis® (Pronidesivir) is a non-prescription veterinary medicine used for the treatment of feline infectious peritonitis (FIP) in cats. It is indicated for all known forms of FIP, including effusive (wet), non-effusive (dry), neurological, and ocular types.

NeoFipronis® (Pronidesivir) is not approved for use in humans and should only be administered to cats. Use under the guidance of a licensed veterinarian is strongly recommended.

Do not exceed the recommended daily dosage. Overdosing may increase the risk of adverse effects, including liver or kidney strain.

IMPORTANT SAFETY INFORMATION

Before giving NeoFipronis® (Pronidesivir) to your cat, tell your veterinarian if your cat:

  • Is under 4 weeks of age
  • Is pregnant or suspected to be pregnant
  • Has known liver or kidney disease
  • Is receiving other medications, supplements, or undergoing concurrent treatment

Using NeoFipronis® (Pronidesivir) with other medications may alter its effectiveness or increase the risk of interactions. Always inform your veterinarian of any other treatments your cat is receiving.

The standard dose is 15mg/kg orally once daily on an empty stomach. Higher doses (up to 30mg/kg) may be needed for cats with neurological or ocular FIP. Do not change the dosage without veterinary advice.

What are the possible side effects of NeoFipronis® (Pronidesivir) ?

The most commonly observed side effects include vomiting, loss of appetite, lethargy, and mild gastrointestinal discomfort. These effects are generally manageable and reversible. Serious adverse effects are rare when used as directed.

Regular monitoring of your cat’s bloodwork—including liver and kidney function—is recommended during treatment. Discontinue use and contact your veterinarian immediately if serious reactions occur.

Talk to your veterinarian for medical advice about side effects or concerns regarding treatment.

NeoFipronis® (Pronidesivir) is a non-prescription veterinary medicine, and its use under veterinary supervision is strongly recommended.

Keep out of reach of children and animals. Not for human use.

For full prescribing information and product details, please visit:www.pronidesivir.com.