What is the intent of the abbreviation "prn" in medical terms?

The abbreviation "prn" stands for "pro re nata," a Latin phrase that translates to "as needed." This term is commonly used in medical settings to indicate that a medication or treatment should be administered only when necessary, rather than at scheduled intervals. For instance, a patient may be prescribed pain medication to take prn, meaning they should take the medication when they feel the need for pain relief, rather than on a set schedule. This allows for more personalized care, as patients can manage their symptoms based on their own experiences.

The other options, such as "before meals," "every day," and "as prescribed," denote specific instructions or timings for medication administration, but they do not capture the flexibility implied by "prn." Understanding this abbreviation is crucial for ensuring proper medication management and patient comfort.