What is the meaning of prn?

According to need (physicians use PRN in writing prescriptions. )
- usage: "add water as needed"
- synonyms: as needed, as required, pro re nata

|15 years ago|2.1k views|share |citing

APA	WordNet. (2010). PRN. Retrieved September 20, 2026, from http://smartdefine.org/prn/definitions/1252970
Chicago	WordNet. 2010. "PRN" http://smartdefine.org/prn/definitions/1252970 (accessed September 20, 2026).
Harvard	WordNet 2010, PRN, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/prn/definitions/1252970>.
MLA	WordNet. "PRN" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/prn/definitions/1252970>

Alternative definitions by