VetIMMUNE PI is a new approved immunomodulatory veterinary product. It is a supportive agent for the treatment of Feline Rhinotracheitis and non-effusive form of Feline Infectious Peritonitis. Vetimmune PI triggers the immune system to fight against viral infections by stimulating a nonspecific cellular immune response in cats.

VetIMMUNE PI has been tested on hundreds of cats with positive results and without adverse side effects. It is safe and can be used in kittens over eight weeks of age.


polyprenyl immunostimulant

Active ingredient: phosporylated polyprenols 2 mg/ml              
Other ingredients: isopropyl alcohol, amfotericin, dimetylsulphoxid 
Packaging: 6 vials of 10 ml clear solution for oral application. DO NOT INJECT VetIMMUNE PI.

Direction for use: Remove the blue plastic cover. Do not remove the grey rubber cap. Disinfect the cap of the vial with rubbing alcohol. Use a sterile needle and syringe to withdraw the appropriate dose of liquid. Insert syringe in the mouth of cat and slowly dispense liquid about 1 ml at a time. Make sure the cat swallows the full dose.



The first study on the survival of cats with the dry form of FIP was published in 2009 by Dr. Legendre and Bartges. It was the first time that Polyprenyl Immunostimulant was used to treat cats and the study demonstrated the potential for PI as an effective choice of treatment to improve the survival of cats suffering from the non-effusive form of FIP. Since that time, we have seen significant progress in long-term survival of cats with dry FIP as the result of treatment with VETIMMUNE PI.

If you need more information, please check the following links:


LEAFLET STUDY - Dr. Karen Chan



Polyprenyl Immunostimulant in Feline Rhinotracheitis: Randomized Placebo-Controlled Experimental and Field Safety Studies

Polyprenyl Immunostimulant Treatment of Cats with Presumptive Non-Effusive Feline Infectious Peritonitis In a Field Study



The Voice - Of the Southeast Louisiana
Veterinary Association 

Effect of Polyprenyl Immunostimulant on the Survival Times of Three Cats with the Dry Form of Feline Infectious Peritonitis (FIP)