Clinical trials

VetImmune® is a distributor and does not run clinical trials. Because many customers ask questions about the trials, we are listing past, current, and planned clinical trials that involve Polyprenyl Immunostimulant™.

All clinical trials and are run by Sass & Sass, Inc., the manufacturer, and other research groups. You may request more detailed information from Sass & Sass, Inc. here or by email

Please note that under their ethics in clinical trials guidelines, Sass & Sass, Inc. believes that study animals should not be euthanized but should be provided a chance through adoption and be treated like any owned pet. Sass & Sass, Inc. does not purposely infect animals with fatal diseases and does not support any research that does.

Double-blinded, placebo-controlled clinical trials of the efficacy of Polyprenyl Immunostimulant in feline rhinotracheitis.University of Tennessee-Knoxville. Dr. A.M. Legendre, Principal Investigator.
Status: Completed.
Results published at http://journal.frontiersin.org/article/10.3389/fvets.2017.00024/full

 Field study of efficiency of Polyprenyl Immunostimulant in naturally occurring cases of non-effusive FIP. University of Tennessee-Knoxville. Dr. A.M. Legendre, Principal Investigator.
Status: Completed.
Results published at https://www.frontiersin.org/articles/10.3389/fvets.2017.00007/full

Field safety study of Polyprenyl Immunostimulant. University of Tennessee-Knoxville. Dr. A.M. Legendre, Principal Investigator.
Status: Completed.
Results published at http://journal.frontiersin.org/article/10.3389/fvets.2017.00024/full

Clinical safety study of ocular topical application of Polyprenyl Immunostimulant. University of Tennessee-Knoxville. Dr. D. VanHorn Hendrix, Principal Invetigator.
Status: Completed.
Results presented at the meeting of the American College of Veterinary Ophthalmologists in 2017.

Field efficacy study of Polyprenyl Immunostimulant in herpetic keratitis. University of Tennessee-Knoxville. Dr. D. VanHorn Hendrix, Principal Investigator.
Status: Will open soon. Eligibility: ophthalmology specialists only. The enrollment information will follow.

Case studies in cats with chronic rhinotracheitis treated with Polyprenyl Immunostimulant.
Status: On-going.