What to Do If You Complete the FIP Treatment Course but the Cat Remains FIP Positive

FIP Treatment Not Working: What to Do If Your Cat Remains FIP Positive

FIP treatment not working is one of the most stressful situations for any cat owner. After completing the full 84-day treatment protocol, you expect recovery. However, in some cases, cats may still show symptoms or remain FIP positive. Understanding the possible causes and next steps is very important. Contact FIP Cure Plus immediately if your cat is not responding — our team can help assess the situation.

Common Reasons Why FIP Treatment Is Not Working

1. Incorrect or Inconsistent Dosage

One of the most common reasons is incorrect dosing — dosage not adjusted based on weight, missed doses or inconsistent timing, or incorrect injection technique. As a result, the medication may not reach effective levels in the body. Use our dosage calculator to verify the correct dose and read our side effects guide for injection technique tips.

2. Advanced or Severe FIP

In some cases, treatment not working happens because the disease has progressed too far — late diagnosis, severe organ damage, or weakened immune response. This is why early treatment is critical. Even in advanced cases, increasing the dose under veterinary guidance can sometimes restart progress.

3. Underlying Health Conditions

Other health problems can affect recovery — weak immune system, secondary infections, or chronic diseases. Read our guide on handling FIP with concurrent conditions for how to manage these alongside treatment.

4. Possible Drug Resistance

Although rare, drug resistance can occur when treatment is inconsistent or incorrect. This usually happens with prolonged under-dosing. Read our FIP relapse guide for what to do if symptoms return after apparent remission.

5. Misdiagnosis

Sometimes, treatment not working may indicate a different illness. Other conditions with similar symptoms include cancer, kidney disease, or other infections. Therefore, reassessment is important if there is no improvement. Read our guide to the 4 FIP diagnostic tests.

What to Do If FIP Treatment Is Not Working

1. Consult Your Veterinarian

Review the treatment plan, adjust dosage if needed, and confirm the diagnosis again. Check blood work — read our complete blood work guide for what each marker means.

2. Consider Extended Treatment

In some cases, extending treatment beyond 84 days may help. Continue antiviral therapy and monitor response closely. Some neurological FIP cases require up to 12 months of treatment.

3. Check Overall Health

Identify underlying conditions, treat additional infections, and support the immune system with vitamins and supplements and liver and kidney support.

4. Monitor Symptoms Closely

Track your cat’s appetite, energy level, weight, and behaviour. As a result, you can detect changes early and act quickly. Read our FIP nutrition guide to ensure your cat is getting adequate nutrition during extended treatment.

Final Thoughts

FIP treatment not working can feel discouraging. However, FIP is a complex disease, and some cases require adjustments in treatment. Stay calm, work closely with your veterinarian, and explore all available options. Most importantly, your care and persistence still play a major role in your cat’s recovery. There is always hope, even when progress seems slow. Contact FIP Cure Plus for personalised guidance.

The FIP Cure Plus team is available in English and Arabic at info@fipcureplus.com.

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