Polyprenyl Immunostimulant™ is manufactured by Sass & Sass, Inc. and is the only therapeutic approved by the USDA for the treatment of feline rhinotracheitis. It is a very safe, well-tolerated oral liquid designed with cats in mind. Polyprenyl Immunostimulant™ is formulated as a 2 mg/mL solution of phosphorylated polyprenols and is offered in 10 mL vials or packs of 6 x 10 mL vials.
Polyprenyl Immunostimulant™ works by upregulating innate immunity. It is a very safe product which aids in the reduction of clinical signs resulting from rhinotracheitis infection in cats 8 weeks of age or older. Polyprenyl Immunostimulant™ is often referred to as PI or PPI.