Companion Animals

Cat Feline Infectious Peritonitis Treatment Advances

Feline infectious peritonitis was once uniformly fatal but antiviral treatments now offer the possibility of remission and cure, transforming welfare outcomes for affected cats.

Key Facts

FIP is caused by a mutated form of feline coronavirus that triggers fatal inflammatory disease
The disease affects cats of all ages but is most common in young cats under 2 years
Two forms exist: wet FIP with fluid accumulation and dry FIP with granuloma formation
GS-441524, an antiviral nucleoside analogue, achieves remission in approximately 80-90% of treated cats
Treatment typically involves 84 days of daily injection or oral medication

Welfare Considerations

FIP was historically a death sentence, causing progressive suffering from fluid accumulation, inflammatory disease, neurological signs, and organ failure. The availability of antiviral treatments has dramatically changed welfare outcomes, with many cats achieving long-term remission. Access to treatment is limited by cost and in some countries legal availability. Ensuring cats with FIP can access these life-changing treatments is an important welfare priority.

What You Can Do

Seek specialist veterinary advice immediately if your cat is diagnosed with FIP
Explore treatment options including clinical trials and compassionate use programmes
Contact FIP Warriors and similar support groups for owner guidance and treatment advice
Advocate for improved legal access to FIP antivirals in countries where availability is restricted
Consider pet insurance that covers treatment for conditions like FIP