Cat Feline Infectious Peritonitis Treatment

Feline infectious peritonitis (FIP) was once a universally fatal diagnosis. The availability of antiviral treatments has transformed outcomes and represents a major advance in cat welfare.

Key Facts

FIP is caused by a mutated form of feline coronavirus and causes effusions and organ damage
Prior to 2019, FIP was considered incurable with a median survival of days to weeks after diagnosis
GS-441524, an antiviral nucleoside analogue, achieves remission in the majority of treated cats
Treatment typically requires 12 weeks of daily injections or oral dosing
Remission rates of 80-90% have been reported in clinical studies of GS-441524 treatment

Welfare Considerations

The transformation of FIP from a death sentence to a treatable condition is one of the most remarkable recent advances in companion animal medicine. Before effective antivirals, cats with FIP suffered from progressive fluid accumulation, neurological signs, and eventual organ failure in a distressing and rapid decline. Now, with appropriate treatment, most cats achieve remission and can live full, normal lives. The remaining welfare challenge is treatment access and cost — antiviral courses are expensive and not universally available. Advocacy for affordable access to GS-441524 is directly a welfare issue.

What You Can Do

If your cat is diagnosed with FIP, ask your vet specifically about antiviral treatment options
Connect with FIP patient communities — resources exist for accessing treatment at reduced cost
Ensure newly diagnosed cats receive appropriate supportive care while antiviral treatment begins
Support veterinary research into improved diagnostic tools that allow earlier FIP identification
Advocate for affordable access to GS-441524 and related antivirals through veterinary prescription channels