4 Crucial Factors for Successful FIP Treatment in Cats

Choosing the correct treatment for your cat’s Feline Infectious Peritonitis (FIP) is essential for recovery. Several factors can significantly influence the success rate of FIP treatment in cats. Below are the four most important factors that can help improve treatment outcomes.

1. Opt for GS-441524

First, choose GS-441524 — the antiviral medication with a 92% success rate established by the Pedersen et al. 2019 UC Davis trial. This medication works by stopping the replication of the FIP virus, allowing the cat’s immune system to recover and fight the infection more effectively.

FIP Cure Plus supplies GS-441524 in injectable 20 mg/ml, injectable 30 mg/ml, and oral capsule forms across the GCC.

2. Address Concurrent Ailments

In addition to treating FIP, it is important to address any additional health issues your cat may have. Some cats may suffer from secondary infections, inflammation, or nutritional deficiencies. Treating these conditions alongside the main FIP treatment supports a more complete recovery. Read our guide on prioritising liver and kidney health during FIP treatment and our vitamins and supplements guide.

3. Start Treatment Promptly

Once FIP is diagnosed, treatment should begin as soon as possible. Delays can allow the virus to spread further in the body. Early intervention significantly increases the chances of survival and recovery. Read our guide on why every day counts in FIP treatment.

4. Administer the Correct Dosage

The correct dosage is critical — proper dosing can mean the difference between relapse and full recovery. Always ensure that the medication is administered according to the recommended treatment guidelines. The minimum recommended dosages are:

Wet FIP: 6 mg/kg of body weight — GS-441524 20 mg/ml
Dry FIP: 8 mg/kg of body weight — GS-441524 20 mg/ml
Ocular FIP: 10 mg/kg of body weight — GS-441524 30 mg/ml
Neurological FIP: 10 mg/kg of body weight — GS-441524 30 mg/ml

Use our dosage calculator to calculate the exact dose for your cat’s weight and FIP form.

Signs Your Cat Is Recovering From FIP

When the correct dosage is administered daily, the FIP virus replication slows down and eventually stops. Many cat owners notice improvement within 3–5 days of treatment. Common recovery signs include:

More relaxed breathing
Increased appetite
Improved physical activity
Greater responsiveness to the owner’s voice and touch
Clearer and healthier eyes

Read our complete 84-day treatment timeline to know what to expect at each stage of recovery.

Adjusting Dosages When Necessary

Every cat responds differently to GS-441524 treatment. Dosage adjustments may be required if the cat shows little response to treatment, symptoms worsen during treatment, or a relapse occurs after completing treatment. Read our FIP relapse guide for what to do if symptoms return.