Pro Re Nata is a Latin phrase meaning as the circumstance arises. It has come to be used in prescription medicine as p.r.n. or as needed. This is how PRN® Pharmacal began and it is how we continue to view ourselves today. As true as it was in 1978, the veterinary community can be assured that PRN® Pharmacal will be here when needed to provide products that improve animal health and quality of life. Since its acquisition by Pegasus Laboratories, Inc., a 100% employee-owned company, PRN® Pharmacal has been dedicated to developing specialized therapeutics that address the unmet, underserved and overlooked needs of the veterinary medicine community since 1978. Our commitment: quality solutions – as needed, when needed.