What does “PRN” indicate in medication instructions?

The term “PRN,” derived from the Latin phrase "pro re nata," signifies "as needed." This indicates that medication should be taken only when necessary, rather than on a regular schedule. For instance, a healthcare provider may prescribe a pain reliever to be taken PRN, meaning the patient should only take it when they experience pain rather than at set intervals or times throughout the day.

This concept is crucial in medication management, allowing for flexibility in treatment and preventing overmedication or unnecessary doses. Understanding the meaning of PRN helps pharmacy technicians provide appropriate guidance to patients regarding their medication regimens and ensures that patients are using their medications effectively according to their individual needs.