Product Information

What is Polyprenyl Immunostimulant?

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Polyprenyl Immunostimulant is the first and only available product approved by the U.S. Department of Agriculture (USDA) as a therapeutic for symptoms associated with feline rhinotracheitis virus infection (FRV).

Polyprenyl Immunostimulant

The U.S. Department of Agriculture granted the conditional license for Polyprenyl Immunostimulant USDA "following acceptance of data supporting the product has demonstrated a reasonable expectation of efficacy, is safe under normal conditions of use in field safety trials, and has acceptable purity".  Sass & Sass, Inc. continues to perform additional studies on product efficacy and potency.‚Äč

Polyprenyl Immunostimulant is a 2 mg/ml solution of phosphorylated polyprenols and is an aid in reduction of clinical signs resulting from Feline Rhinotracheitis Virus infection in cats 8 weeks of age or older.

Polyprenyl Immunostimulant is a clear fluid that administered orally.  
single therapeutic dose for Feline Rhinotracheitis (herpes) Virus (FRV) equals 0.25 ml/kg (0.5 mg/kg).  For FRV 2 oral doses of Polyprenyl Immunostimulant should be administered daily for 15 days.  

Polyprenyl Immunostimulant is shipped in individual vials of 10 ml or in packages of 6 vials of 10 ml each.  Polyprenyl Immunostimulant is stable for 12 months from the time of manufacture.  Polyprenyl Immunostimulant should be stored in dark place at 1 – 30 °C and should not be frozenWe recommend storing it in the refrigerator, especially after opening.

PDF DocumentPolyprenyl Immunostimulant Box Insert                                                                                                           

PDF DocumentBrochure on the treatment of feline rhinotracheitis


Find out more about Polyprenyl Immunostimulant:
Introduction | Product Information | Safety Information | FAQ | Publications | Resources