Companion Animals

Cat Feline Infectious Peritonitis Treatment Advances

Feline infectious peritonitis (FIP) was once a universally fatal diagnosis. Antiviral drug treatments developed since 2019 have transformed FIP from a death sentence to a treatable disease, representing a major advance in feline welfare.

Key Facts

FIP is caused by a mutated form of feline coronavirus that becomes virulent and systemic
GS-441524 and remdesivir have shown 80-90% cure rates in clinical studies
Treatment requires 12 weeks of daily antiviral administration, with monitoring for relapse
Wet FIP (effusive) and dry FIP (non-effusive) respond differently to treatment
Cost remains a major barrier as drugs are expensive and not yet universally licensed

Welfare Considerations

FIP causes severe, progressive suffering including fever, weight loss, fluid accumulation, and neurological signs. Before antiviral treatment, euthanasia was the only humane option. The advent of effective treatment has transformed the welfare calculus - cats with FIP can now recover fully. However, access barriers mean many cats still die unnecessarily. Advocacy for drug licensing and affordable access directly improves feline welfare worldwide.

What You Can Do

Consult a feline specialist immediately if FIP is suspected - early treatment improves outcomes
Join support groups that help source GS-441524 for cats in countries without licensed access
Advocate for fast-tracked regulatory approval of antiviral FIP treatments globally
Donate to feline health research funds supporting further antiviral development