What does "PRN" indicate on a prescription label?

"PRN" is a medical abbreviation derived from the Latin phrase "pro re nata," which translates to "as needed." This term is commonly used in prescriptions to indicate that the medication should be taken only when the patient feels it is necessary, rather than at scheduled intervals. This allows for flexibility in managing symptoms, such as pain or anxiety, where the need for medication may vary.

Understanding the concept of PRN administration is crucial for pharmacy technicians as it directly influences how patients manage their medications and the effectiveness of their treatment. For instance, a patient may have a pain reliever prescribed on a PRN basis, meaning they should only take it when they are experiencing pain, rather than on a continuous schedule. This approach is especially important for medications that can cause side effects or dependency if taken regularly without need.