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FIP Treatment: Add Vitamins and Supplements for a Speedy Recovery

Updated: Jan 18

In the previous post, we discussed the importance of caring for liver and kidneys' health during FIP treatment. In this article, we go a step further by recommending giving your cat vitamins and supplements to keep kidney and liver healthy and strong during FIP treatment. Healthy internal organs increase body's ability to resist infections and recover from illness. There is no known adverse side effects when vitamins and supplements are given along side of GS-441524 during FIP treatments. Consult your veterinarian on the concentration and type of vitamins they recommend.


B12 is normally derived from foods of animal origin such as meat, liver, fish, and eggs. It is part of your cat's normal diet. Most commercial cat food covers the daily B12 requirements for a healthy cat. A cat that is suffering from FIP, however, will deplete B12 quickly and requires supplementation.

  • B12 promotes the development and maintenance of red blood cells.

  • B12 maintains nervous system integrity (nerve cells and normal myelination – the fatty sheaths that cover and protect nerve endings). It is essential for nerve and cognitive functions.

  • B12 keeps the intestines healthy for the proper digestion and absorption of food, as well as the metabolism of carbohydrates and fats.

Vitamin B12 is extremely safe to use. Subcutaneous B12 injections can be given weekly to help fight anemia and support the immune system. Daily vitamin support can be given via oral liquids such as Pet Tinic or similar.  


Gabapentin:  A mild pain reliever that can be given orally 60-90 minutes before injections. This will reduce the pain of injections without leaving your cat feeling groggy or overly sedated.

CBD Oil: Some owners have found that CBD oil helps provide relief of pain, stiffness, anxiety, and even seizures.  It also acts as an appetite stimulant to help keep your kitty eating.  CBD Oil can be used with palliative treatment options, and also works well as a mild sedative, should you choose to treat FIP with GS441524 injections. If using CBD, it absolutely MUST be veterinary quality oil, and you should consult with your vet for dosage information. The wrong product or dosage can do more harm than good!

Hemp Oil May be used in lieu of CBD Oil.

Lidocain cream: Can be applied to the cat’s skin 30 minutes before giving a GS-441 injection, this can help reduce the sting of the drug. Be certain to use the cream that does NOT contain aloe, as aloe is highly toxic to cats.

Slippery Elm Bark:  Slippery elm bark syrup is an all natural remedy for the treatment of nausea, vomiting and other ailments.

Denamarin: Denamarin Tablets are a liver supplement for cats that raises antioxidant levels.

Silymarin (Milk Thistle): Boost your cat’s liver function with this natural supplement known for its capacity to support and protect the liver.

We recommend giving your cat Denamarin or Silymarin to provide maximum liver support during FIP treatment.

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