What is the implication of an order written as "PRN"?

An order written as "PRN" stands for "pro re nata," a Latin term that translates to “as needed” or “as the situation demands.” This terminology is commonly used in medical prescriptions or orders to indicate that a medication or treatment should only be given when it is deemed necessary by the healthcare provider or when specific criteria are met, rather than on a fixed schedule.

For example, a patient may be prescribed pain medication PRN, meaning they can take the medication when they experience pain rather than taking it at regular intervals. This provides flexibility for the patient’s treatment, allowing for dosing based on their current symptoms or needs, rather than enforcing a scheduled administration. Understanding PRN orders is crucial for effective patient care and ensuring that medications are administered safely and appropriately.