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Treatment

About FIP treatment

Author
FIP Together editorial team
Veterinary review
Pending
Published
16 Oct 2026
Last reviewed
Not yet

This article hasn't yet been reviewed by a veterinarian. It is based on the published sources listed below.

For many years FIP was considered untreatable. Antiviral medications have since changed the outlook for many cats, and treatment approaches continue to evolve. What's available and legal differs between countries.

Your veterinarian chooses the medication, the dose, how often it's given, and how long treatment lasts, based on your cat's weight, the form of FIP, and how your cat responds. Treatment courses commonly last several weeks to months.

Why monitoring matters

  • Doses are often based on body weight, which may change during treatment. Your vet may adjust the dose.
  • Regular check-ups and blood tests help your vet judge how treatment is going.
  • Your vet decides when treatment ends. Reaching the last day on a calendar isn't the same as being finished.

Important safety points

  • Don't change the dose, timing or duration without talking to your veterinarian.
  • Be cautious about medications obtained outside veterinary supervision. Quality and content can vary.
  • If a dose is missed or vomited, contact your vet for advice rather than giving extra medication.

FIP Together doesn't recommend medications or doses. Enter exactly what your veterinarian prescribed.

Sources

  1. Tasker S, et al. Feline Infectious Peritonitis: European Advisory Board on Cat Diseases Guidelines. Viruses. 2023;15(9):1847.
  2. International Cat Care: Feline infectious peritonitis (FIP)
  3. EveryCat Health Foundation: FIP resources

This article is general information, not veterinary advice. It can't account for your cat's individual situation. Always follow the guidance of the veterinarian treating your cat.