In the context of medication, what does the abbreviation "PRN" stand for?

The abbreviation "PRN" stands for "as needed," which indicates that a medication should be administered only when necessary, rather than on a regular schedule. This is often used for medications that are intended to relieve symptoms rather than to maintain a constant level in the body, such as pain relievers or anti-anxiety medications. For example, a patient might be prescribed a pain medication to take PRN, which means they can take it only when they are experiencing pain rather than at set intervals. The understanding of "PRN" is crucial for proper medication management, ensuring that individuals receive medication in a way that meets their immediate health needs without unnecessary dosing.