FAQ About FIP Treatment
This FIP treatment FAQ answers common questions about treatment, care, and what to expect during FIP treatment.

FIP Treatment Must-Knows
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What should I feed my cat during the treatment?
During FIP treatment, you should feed your cat freshly cooked fish, chicken, or other natural foods. However, if your cat develops diarrhea, switch to dry cat food for a few days until the symptoms improve.
How long is the treatment?
The standard FIP treatment duration is 12 weeks.
However, the actual length may vary depending on several factors, such as:
- How your cat responds to the treatment
- The stage of FIP when treatment begins
- Your personal financial situation
As a result, some cases may require closer monitoring and dosage adjustments.
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Can GS-441524 be used with other medications?
Yes, GS-441524 works as an antiviral treatment and can be combined with certain supportive medications to improve overall health.
However, you should avoid using the following:
- Lysine IS with GS.
- Antibiotics like Fluoroquinolones, as they can harm the nervous system of cats with FIP.
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Can Interferon be used for FIP treatment?
Interferon helps reduce FIP symptoms by regulating the immune response.
However, it does not treat the FIP virus itself and cannot cure the disease.
For this reason, it should only be considered as supportive care, not a primary treatment. - What else should I know?
- As your cat recovers, its appetite will improve and weight gain will occur naturally.
Therefore, weigh your cat weekly and adjust the dosage when necessary. - In addition, work closely with your veterinarian to monitor potential complications, such as liver or kidney issues and secondary infections.
Injection Treatment
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How much GS is in a vial?
Each standard GS-441524 injection vial contains 8 ml of solution. Each GS-441524 + Vitamin B12 injection vial contains 10 ml, for both 20 mg/ml and 30 mg/ml concentrations. -
Why offer 2 concentrations?
Higher concentrations are suited for larger cats or cats with severe FIP symptoms. -
How much and how often should I inject?
You should administer injections once daily, based on your cat's body weight, throughout the full 12-week treatment period. -
How to calculate the appropriate dosage?
Use our dosage calculator for precise measurements. Avoid reducing the dosage during treatment to prevent viral resistance to GS. -
How should I store the vials?
Store vials at room temperature (25°C or 77°F), away from direct sunlight.
Shipping & Customs Clearance
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How long does shipping take?
Delivery can take as little as 2–3 business days to selected destinations. Actual delivery times depend on the destination, selected carrier and service, remote-area coverage, and customs processing. Enter your delivery address at checkout to view available services and estimates. -
Can you ship to all countries?
We ship internationally to supported destinations. Availability depends on local requirements and logistics. Enter your delivery address at checkout to view available shipping options, or contact us for help. -
How quickly are orders shipped?
Dispatch timing depends on order processing, product availability, carrier collection schedules, weekends and public holidays. Contact us for an order-specific dispatch estimate. Transit time begins after the carrier receives the shipment. -
How can I track my shipment?
Use the tracking number or link provided for your shipment to follow updates from the selected carrier. Tracking updates may take time to appear after the shipment is handed over. -
Do you handle customs clearance?
We assist with the shipment documents available for your order. Customs procedures and requirements vary by destination. The carrier or customs authority may request additional information or approvals from the recipient, who is responsible for completing applicable local requirements. -
What documents might customs require?
The carrier or customs authority may request an invoice, payment receipt or other supporting documents. Contact us if you need a copy or clarification of your order documents. Documents must accurately reflect the transaction, and applicable taxes and duties remain subject to local rules.
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