Helping the body fight disease®

COMMERCIALLY AVAILABLE WORLDWIDE*

Polyprenyl Immunostimulant™ (PI) is USDA licensed in the US for the treatment of Feline Viral Rhinotracheitis (FVR).
VetImmune PI™ is registered in the EU for the treatment of Feline Herpesvirus infection (FHV-1) and Feline Infectious Peritonitis (FIP).

HEALTHY CATS IS OUR BUSINESS

Polyprenyl Immunostimulant™ (PI) is  the only therapeutic licensed in the the US by the USDA for the treatment of Feline Viral Rhinotracheitis (FVR). VetImmune PI™ is registered in Czechia (EU) for the treatment of feline herpesvirus (FHV-1) and Feline Infectious Peritonitis (FIP).
Polyprenyl Immunostimulant™ is a safe and effective treatment option that works by upregulating innate immunity and directing cellular immune response. 

polyprenyl Immunostimulant bottles

Viral diseases and the immune system

Immunostimulating (immunomodulatory) medicines are a new, cutting edge development designed to rebuild the damaged immunity and direct it against the invading viruses. In some instances, an antiviral drug may be needed in addition to an immunostimulant drug, but won’t replace it, because suppressing the agent of the disease does not restore the immune system..

how immunity affects how your cat fights off viral diseases like FIP and FVR
polyprenyl immunostimulant for URI FVR feline herpesvirus

Does your cat have FVR?

Feline viral rhinotracheitis (FVR, FRV, FHV-1)is  a common and ubiquitous upper respiratory infection (URI). Polyprenyl Immunostimulant™ is a proven product for the treatment of Feline Rhinotracheitis, designed with cats and their guardians in mind.

FIP Research

Consulting with the USDA, Sass & Sass, Inc. has been designing and is getting ready to conduct a new FIP efficacy study in parallel with the study of Polyprenyl Immunostimulant™ for herpetic ocular disease.

Polyprenyl Immunostimulant for Feline Infectious Peritonitis FIP research

ORDER POLYPRENYL IMMUNOSTIMULANT™

Cat Guardians

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HELPFUL LINKS

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Dosage Calculator

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FAQs

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Latest news

News and updates about our company and our products.

RESEARCH + INNOVATION

We bring unique veterinary biologics to the market to improve the health of our companions. ​

FVR Research & TrialsFIP research and Trials

TESTIMONIALS

Here’s what people have to say about Polyprenyl Immunostimulant™ for the health of their cats

Our Buddy has WET FIP and your meds have given him a second chance! He’s thriving and if we can help even one other family with their kitty, we are so grateful! Cheers to good health and thriving
Monica M.
Buddy's Mom
Worked well on kitten fosters with URI symptoms. Improved the quality of life of our FIP kittens.
Irene L.
Foster Mom to many
We are so grateful that we've been granted so much extra time with Gidget when we were originally told he would likely die from this disease (as many other kitties have). Today, nearly 4.5 years later, he remains as healthy as can be expected, confirmed with biannual blood work."
dr. Brandy S.
Gidget's Mom
Do-Dam, who lives in South Korea, is a long-term survivor, is doing very well, and her mommy is happy.
Yi-Na
Do-Dam's mom

Read more success stories and testimonials from happy cat owners and their cats on our Facebook page.

* Polyprenyl Immunostimulant™ is not or may not be available in a small number of countries due to country-specific regulations or contractual limitations.