In medical documentation, what does “PRN” mean?

The term “PRN,” which stands for “pro re nata” in Latin, translates to “as needed” in English. This term is commonly used in medical documentation to indicate that a medication or treatment should be administered only when necessary rather than at scheduled times.

In clinical practice, this helps healthcare providers to tailor patient care more effectively, allowing for flexibility based on the patient’s condition or symptoms rather than adhering to a strict regimen. For example, a patient might be prescribed pain medication PRN, meaning they should take it only if they experience pain rather than at fixed intervals.

While “as necessary” might seem similar and is also a common phrase in healthcare to convey a need-based approach, “as needed” is the more precise translation of PRN in both medical literature and documentation. Therefore, understanding the context and traditional usage of the term solidifies its correct interpretation in medical settings.