CaliciX™ - 15mg Antiviral Therapy for Feline Calicivirus Stomatitis
Choose Cat's Body Weight
CaliciX™ is a feline-specific antiviral treatment developed to support cats affected by Feline Calicivirus (FCV), a common viral infection responsible for painful oral disease in cats. Often referred to as calicivirus, feline calici, or virus calici, this infection is a leading cause of stomatitis, gingivitis, mouth ulcers, and chronic oral inflammation in cats. CaliciX™ is designed to target the virus directly, rather than only managing symptoms.
What Is Feline Calicivirus in Cats?
Feline Calicivirus (FCV) in cats is a highly contagious viral disease. Cats with Feline Calicivirus (FCV) may develop persistent inflammation in the mouth, making eating and grooming painful. Common search terms such as fcv cat, fcv in cats, and calici in cats all refer to this same condition.
Common Calicivirus Cat Symptoms
Cats suffering from Feline Calicivirus (FCV) may show:
Severe gum inflammation Painful mouth ulcers on the tongue, gums, or cheeks Excessive drooling Bad breath Difficulty eating or swallowing Reduced appetite and weight lossThese calicivirus symptoms can worsen over time, especially in chronic or recurrent cases.
How CaliciX™ Helps Cats With Calicivirus
Each CaliciX™ capsule contains 15 mg of EIDD-1931, the active antiviral form, formulated specifically for cats. Unlike supportive care alone, CaliciX™ works by:
Targeting Feline Calicivirus (FCV) replication Reducing viral activity at the source Supporting healing of oral tissuesThis makes CaliciX™ a targeted option for calicivirus cats treatment, particularly when oral disease is persistent or recurrent.
Conditions Supported by CaliciX™
CaliciX™ may be used under veterinary guidance to support cats diagnosed with:
Feline Chronic Gingivostomatitis (FCGS) Juvenile gingivitis Caudal stomatitis Viral mouth ulcers Glossitis associated with Feline Calicivirus (FCV)Many cat parents report improvements in comfort, appetite, and overall quality of life when CaliciX™ is included in a veterinarian-guided treatment plan.
Why Choose CaliciX™ for FCV in Cats?
Designed specifically for Feline Calicivirus (FCV) Contains EIDD-1931, not a human medicine Targets the viral cause, not just symptoms Supports long-term management of calici symptomsIf your cat suffers from calicivirus cat symptoms or recurring oral pain related to Feline Calicivirus (FCV), CaliciX™ offers a modern antiviral approach built specifically for feline needs.
Which Strength: CaliciX™ or CaliciX™ Max
Mild cases (early ulcers, juvenile gingivitis, mild viral mouth irritation) and moderate cases (gingivostomatitis with eating discomfort, drooling, moderate ulceration): use CaliciX™ Severe cases (Feline Chronic Gingivostomatitis (FCGS), caudal stomatitis, extensive ulceration, severe pain, anorexia): use CaliciX™ MaxBoth strengths follow the same weight-based dosing. Your veterinarian chooses the strength.
Dosage Adjustment Guidance
Dosage may be adjusted by a licensed veterinarian based on the cat's clinical response. Signs that may indicate insufficient dosage include:
Persistent drooling Pain or discomfort while chewing Slow healing of oral ulcers Unintended weight lossAny dosage increase should remain within the recommended range and must be performed only under veterinary direction.
Veterinary Use Notice
Use under veterinary supervision. Dosage and treatment duration may vary based on the severity of Feline Calicivirus (FCV) in cats and clinical response.
Dosage Instruction
Dosage Instructions
Administer one (1) capsule per 2.5 kg of body weight, given every 12 hours, preferably on an empty stomach. If vomiting occurs within 30 minutes, administer another capsule.
Dosing Examples
• Example 1: a 2.0 kg cat with Feline Calicivirus (FCV) associated gingivitis and mouth ulcers should receive one capsule every 12 hours.
• Example 2: a 4.6 kg adult cat with chronic Feline Calicivirus (FCV) oral disease should receive two capsules every 12 hours.
• Example 3: a 6.0 kg cat should receive three capsules every 12 hours.
Monitoring and Follow-Up
We recommend ongoing evaluation by your primary veterinarian, with a complete blood panel approximately every 30 days for cats on prolonged treatment. Regular monitoring allows your veterinarian to assess clinical response and determine whether continued treatment, dose adjustment, or discontinuation is appropriate.
Signs that may indicate insufficient dosage include persistent drooling, pain or discomfort while chewing, slow healing of oral ulcers, and unintended weight loss. A dosage increase may be warranted if symptoms persist after 30 days of treatment, and must be performed only under veterinary direction. Seek veterinary direction or contact us for recommendations.
Product Description
Active Ingredient: EIDD-1931
Inactive Ingredient: Dibasic Calcium Phosphate, Magnesium Stearate
Form: Size #3 Capsules
Indications: Cats diagnosed with Feline Calicivirus (FCV), including Feline Chronic Gingivostomatitis (FCGS), juvenile gingivitis, caudal stomatitis, viral mouth ulcers, and glossitis associated with Feline Calicivirus (FCV)
Specification: 60 capsules, each containing 15 mg of EIDD-1931
Dosage: 1 capsule every 12 hours for every 2.5 kg of body weight, preferably on an empty stomach. If vomiting occurs within 30 minutes, administer another capsule.
Not Recommended Use:
• Pregnant queens at any stage, nursing queens, and breeding cats. EIDD-1931 has potential teratogenic effects and can harm developing kittens.
• Feline Infectious Peritonitis (FIP). CaliciX™ is formulated for Feline Calicivirus (FCV). See our GS-441524 and dual antiviral products for Feline Infectious Peritonitis (FIP).
• Cats not feeding or defecating normally, and cats with a history of poor dietary absorption, without veterinary supervision.
• Severe or refractory disease, where CaliciX™ Max at 30 mg is the appropriate strength.
Use With Caution: Hepatic impairment, renal disease (especially alongside NSAIDs), and long-term use beyond 12 weeks without monitoring. Avoid ribavirin. Immunosuppressants such as cyclosporine may reduce the immune response needed to clear the virus. Steroids may be used short term but should be tapered. Compatible with antibiotics, gabapentin, mirtazapine, maropitant, vitamin B12, and probiotics.
Length of Treatment: 30 to 60 days, or as recommended by a veterinarian.
Storage: Store in a dry, cool place away from sunlight, below 25 degrees Celsius. Protect from moisture and light.
Packaging: Each pack contains 60 capsules in a vacuum-sealed mylar bag. For cats weighing up to 2.5 kg, one 60 capsule pack covers 30 days. For cats weighing 2.5 to 5 kg, 120 capsules cover 30 days. For cats weighing above 5 kg, 180 capsules cover 30 days.
Expiration: 12 months
Regulatory Status: EIDD-1931 is not currently licensed for feline use, and no antiviral is approved by the United States Food and Drug Administration for the treatment of Feline Calicivirus (FCV). Intended for off-label veterinary application under professional supervision. Use requires informed consent from the animal owner.
Shipping Info
Shipping Time:
2 days to major US Cities
3 ~ 4 days to US townships and Canada .
Shipping Condition:
Shipped under ambient temperature in individually packed, air sealed mylar bags.
Return and Refund Policy
To uphold the highest standards of pharmaceutical safety, quality, and product integrity, we are unable to accept returns or issue refunds once an order has been delivered. This ensures that every product that reaches our customers has been handled, stored, and managed according to strict quality control requirements.
If your order is damaged, defective, or lost in transit, we will provide a free replacement at no additional cost to you. Simply contact our support team with your order details, and we will resolve the issue promptly.
This policy protects the safety of all customers and ensures that every product dispensed remains uncompromised and fully compliant with pharmaceutical standards.