CaliciX™ is a feline antiviral capsule for cats affected by Feline Calicivirus (FCV), the infection behind much of the painful oral disease seen in cats. Each capsule delivers 15 mg of EIDD-1931, the active antiviral form of molnupiravir, in a size 3 capsule small enough to give at home.
What Feline Calicivirus (FCV) does to a cat
Feline Calicivirus (FCV) is highly contagious and often settles in the mouth. Affected cats commonly show inflamed gums, ulcers on the tongue, gums or cheeks, heavy drooling, bad breath, and difficulty eating or grooming. Because the pain is constant, many cats stop eating properly and lose weight before the cause is identified.
How CaliciX™ works
Most Feline Calicivirus (FCV) care manages the symptoms. CaliciX™ acts on the virus itself. EIDD-1931 is incorporated into viral RNA during replication and drives the accumulation of errors in the viral genome, suppressing further replication. The mechanism does not depend on viral proteases and carries a high genetic barrier to resistance.
Given under veterinary guidance for
- Feline Chronic Gingivostomatitis (FCGS)
- Juvenile gingivitis
- Caudal stomatitis
- Viral mouth ulcers
- Glossitis associated with Feline Calicivirus (FCV)
Why the feline formulation matters
CaliciX™ contains EIDD-1931 itself, not human molnupiravir tablets divided down. The 15 mg strength is built around feline weight bands, so dosing stays accurate and repeatable, and the capsule contents can be mixed into food.
If your cat is dealing with recurring mouth pain from Feline Calicivirus (FCV), speak to our team or your veterinarian about whether CaliciX™ fits into the treatment plan.
CaliciX™ 15 mg Antiviral Capsules for Feline Calicivirus (FCV)
Dosed by body weight, twice daily, twelve hours apart:
- Cats under 2.5 kg: 1 capsule every 12 hours
- Cats 2.5 kg to 5 kg: 2 capsules every 12 hours
- Cats above 5 kg: 3 capsules every 12 hours
Size 3 capsules. The capsule can be given whole or opened and mixed through food.
Length of treatment: determined by your veterinarian based on your cat's response. Do not reduce, taper or stop antiviral dosing without veterinary direction. [TODO: confirm whether a standard course length has been established]
Signs the dose may be insufficient: drooling that persists, discomfort while chewing, oral ulcers that are slow to heal, unintended weight loss. If signs are still present after 30 days of treatment, a dose increase may be appropriate. Contact your veterinarian or our team before changing the dose.