Treatment Options for FIP: EIDD-193, Antivirals, and Supportive Care
- MolnuFIP™
- May 5
- 3 min read
Feline Infectious Peritonitis (FIP) was once considered a fatal diagnosis for cats. However, breakthroughs in antiviral therapy—particularly EIDD-1931, the active form of molnupiravir used in MolnuFIP—are now offering real hope for recovery. This in-depth guide explores the current treatment landscape for FIP, including how antivirals work, their effectiveness, the importance of supportive care, and global access issues.
✨ Overview of Available FIP Treatments
FIP treatment has evolved significantly in the last few years. Today, a combination of antiviral medications and supportive care can help cats survive and recover from FIP. The three main categories of treatment include:
Antiviral therapies such as EIDD-1931 (molnupiravir) and GC376
Supportive care, including hydration, nutrition, and anti-inflammatory medications
Ongoing monitoring and blood tests to track recovery and detect relapses
Early diagnosis and prompt treatment initiation significantly improve a cat's chance of survival.
🔬 EIDD-1931 (Molnupiravir): Mechanism and Success Rate
EIDD-1931 is the active metabolite of molnupiravir, an antiviral originally developed for human use during the COVID-19 pandemic. It works by introducing errors into the virus's RNA during replication, preventing it from reproducing.
Key Points:
Mechanism: Lethal mutagenesis of viral RNA
Target: Feline coronavirus (FCoV), the cause of FIP
Dosage: Determined by weight and clinical form (wet, dry, neurological)
Success Rates
Clinical success has been observed in 80–90% of treated cats when therapy begins early and is properly managed.
MolnuFIP, which contains pharmaceutical-grade molnupiravir, has become a widely trusted option globally, with a strong safety profile.
MolnuFIP is especially noted for its ability to cross the blood-brain barrier, making it a powerful option for neurological FIP cases.
📊 Other Antiviral Options and Research
While EIDD-1931 is currently among the most effective and accessible options, other antivirals include:
1. GC376
Protease inhibitor
Shows good results for wet and dry FIP, but is less effective for neurological FIP
2. Remdesivir (used off-label in some countries)
Similar mechanism to GS-441524
Limited feline data and usually more expensive
3. GS-441524
Previously a leading treatment, but now often replaced by molnupiravir due to cost, availability, and improved brain penetration
Continued research is ongoing into combination therapies and shorter treatment durations.
☕ Supportive Care: Fluids, Nutrition, and More
Antivirals alone may not be enough. Supportive care plays a vital role in helping cats recover from the effects of FIP.
Key Aspects of Supportive Care:
Hydration: Subcutaneous fluids help maintain kidney function and circulation
Appetite Stimulation: Medications like mirtazapine can prevent dangerous weight loss
Anti-inflammatories: Steroids or NSAIDs reduce painful inflammation
Supplements: B vitamins, liver support (SAMe), and probiotics can aid recovery
Temperature Control: Monitoring fevers and keeping cats warm or cool as needed
Owners should work closely with veterinarians to tailor supportive care based on lab results and symptoms.
📈 Real-Life Treatment Outcomes
Thousands of cats worldwide have now recovered from FIP thanks to antivirals like EIDD-1931.
Recovery Timelines:
Day 0–7: Fever, appetite, and energy levels begin to normalize
Week 2–4: Fluid accumulation in wet FIP may resolve; neurological signs may begin to stabilize
Week 6–8: Weight gain, normal blood values
Week 12: End of antiviral course for most cats, followed by 12-week observation period
Relapses are possible, especially if treatment is stopped prematurely, so adherence to the full protocol is crucial.
🌐 Accessibility and Legal Status Globally
EIDD-1931 (Molnupiravir) is not yet formally licensed for veterinary use in most countries, but it is legally available in many regions through compassionate use or veterinary-authorized platforms like MolnuFIP.
Regional Availability:
USA/Canada: Available via trusted online distributors; consult your vet
EU: Regulated; some vets prescribe under special exemption
Asia: Widely used in countries like Japan, South Korea, and Indonesia
Australia/NZ: Importation allowed with veterinary oversight
Always verify the source. MolnuFIP ensures purity and lab-tested quality control.
📆 Conclusion: Hope for FIP-Affected Cats
The landscape of FIP treatment has transformed, with antiviral options like EIDD-1931 offering real hope to what was once a terminal diagnosis. When combined with supportive care and responsible monitoring, many cats can return to full health.
If your cat has been diagnosed with FIP, visit MolnuFIP to learn more about accessing antiviral treatment, dosage guidance, and recovery support from a trusted provider.
Early action saves lives.
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