HerpX™ - 180mg Famciclovir Antiviral Therapy for Feline Herpesvirus (FHV-1)
HerpX™ is an oral antiviral for cats living with Feline Herpesvirus (FHV-1), the infection behind most recurring eye and upper respiratory flares. Each film-coated tablet contains 180 mg of famciclovir and is given at home under veterinary direction.
Formulated for cats, not adapted from human medicine
Famciclovir is considered systemically well tolerated in cats when dosed correctly. That distinction matters: acyclovir and valacyclovir, two human antivirals sometimes reached for by mistake, are associated with toxicity in cats. HerpX™ is intended for feline use under veterinary guidance.
Support across the main forms of FHV-1
Ocular flares, including conjunctivitis and corneal disease Upper respiratory flares, including sneezing, nasal discharge and congestion Recurrent flares triggered by stress
Consistent dosing, clear guidance
Fixed 180 mg film-coated tablet, so repeat weight-based dosing stays consistent Built around published feline dosing literature Given under veterinary supervision
Feline Herpesvirus remains in the body for life and is not eliminated. Treatment is directed at the frequency and duration of flares rather than at clearing the virus.
Dosage Instruction
Give 180 mg, which is one HerpX™ tablet, for every 2 kg of body weight, every 12 hours, or as directed by your veterinarian. Administer approximately 1 hour before feeding for optimal absorption.
Indicative guide, confirm with your veterinarian:
• Cat around 2 kg: 180 mg per dose, 1 tablet, every 12 hours
• Cat around 4 kg: 360 mg per dose, 2 tablets, every 12 hours
• Cat around 6 kg: 540 mg per dose, 3 tablets, every 12 hours
Because the exact dose depends on your cat's weight and your veterinarian's assessment, confirm the number of tablets per dose before starting.
Monitoring and follow up. We recommend ongoing veterinary review during treatment so your veterinarian can assess the response and decide whether to continue or adjust. Antiviral dosing should not be reduced or tapered without veterinary direction.
Product Description
Active Ingredient
Famciclovir 180 mg
Inactive Ingredients
Magnesium Stearate 2 mg, Croscarmellose Sodium 16 mg, Hydroxypropyl Methylcellulose 24 mg, Colloidal Silicon Dioxide 2 mg, Excipients 175 mg
Form
180 mg film-coated tablets, 60 tablets per pack
Indications
Antiviral support for cats with Feline Herpesvirus (FHV-1), including ocular and upper respiratory flares
Specification
60 tablets, each containing 180 mg famciclovir
Dosage
180 mg, one tablet, for every 2 kg body weight, every 12 hours, or as directed by your veterinarian. Administer 1 hour before feeding. See Dosage Instruction.
Not Recommended Use
Not for use in cats with known hypersensitivity to famciclovir. Consult your veterinarian before use in pregnant or nursing cats, or in cats with reduced kidney function.
Length of Treatment
Continue past resolution of signs, as directed by a veterinarian. Do not reduce or taper the dose without veterinary direction.
Storage
Store at room temperature, 15 to 25 °C, away from moisture and direct sunlight. Keep out of reach of children.
Packaging
Cold-form Alu-Alu blister, carton 52 x 110 x 30 mm, net weight 25 g
Expiration
12 months from the manufacturing date
For veterinary use only.
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.