Molnupiravir is an oral antiviral medication increasingly used off-label by veterinarians worldwide for the treatment of feline infectious peritonitis (FIP), including both wet and dry forms, as well as feline coronavirus (FCoV) infections. It works by interfering with viral RNA replication, helping to reduce viral load and support recovery in affected cats.
Key Features & Usage
- Effective against FIP-causing coronavirus mutations
- Easy-to-administer oral capsules or compounded liquid
- Often used alone or in combination with GS-441524 or other supportive therapies
- Suitable for kittens and adult cats diagnosed with FIP (neurological, ocular, or effusive forms)
Dosage
- Standard doses (8-16 mg/kg twice daily) may be used for neurological/ocular FIP
- Treatment duration: usually 28-56 days (4-8 weeks)
- Always weigh your cat accurately and follow your veterinarian’s exact prescription
Side Effects
- Generally well-tolerated
- Rare mild gastrointestinal upset (vomiting, diarrheas)
- Potential suppression of bone marrow/red blood cell production at very high doses (regular blood work recommended)
- Not recommended for pregnant queens or very young kittens (<6 weeks) without veterinary supervision