In medication administration, what does the term "prn" mean?

The term "prn" is derived from the Latin phrase "pro re nata," which translates to "as needed." This means that a medication is to be administered only when it is necessary based on the individual's current condition or symptoms, rather than on a fixed schedule. For example, a medication prescribed "prn" might be given for pain relief only when the patient reports discomfort, rather than at set intervals throughout the day. This approach allows for more personalized and responsive care, providing treatment that is tailored to the patient's immediate needs. Thus, the correct answer clearly indicates the intended use of the medication in question.