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Pro re nata is a Latin phrase meaning “in the circumstances” or “as the circumstance arises” (literally “for the thing born”). In medical terminology, it is often abbreviated PRN or P.R.N. What is PRN slang? as needed; as the circumstances require. What PNR means? PNR is the abbreviation of PassengerRead More →

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Reviewed on 3/29/2021. p.r.n.: Abbreviation meaning “when necessary” (from the Latin “pro re nata”, for an occasion that has arisen, as circumstances require, as needed). What does PRN in medication mean? DEFINITION. PRN (pro re nata) medication is medication that has been identified as being. needed to be occasionally administeredRead More →