Which abbreviation indicates that a medication should be administered "as needed"?

The abbreviation that indicates a medication should be administered "as needed" is prn. This term is derived from the Latin phrase "pro re nata," meaning "as the situation arises" or "as the occasion demands." It is commonly used in medical settings to instruct healthcare providers that a medication should only be given when the patient requires it, rather than at scheduled intervals.

Using this abbreviation helps to provide flexibility in patient care, ensuring that medications are given in response to specific symptoms or conditions rather than on a strict schedule. Understanding this terminology is crucial for medication aides to ensure they are following proper protocols and meeting the needs of their patients effectively.