What does the abbreviation "PRN" mean in medical terms?

The abbreviation "PRN" stands for "pro re nata," a Latin phrase meaning "as needed." In a medical context, it is commonly used to describe medications or treatments that are to be administered only when a patient requires them, rather than on a fixed schedule. For example, a doctor might prescribe pain medication to be taken PRN, meaning the patient should take it when experiencing pain rather than at regular intervals throughout the day.

This approach allows for flexibility in treatment, enabling healthcare providers to tailor care more specifically to the individual needs of patients. It contrasts with other terms that indicate pre-scheduled or fixed dosage instructions. By understanding this abbreviation, medical assistants and other healthcare professionals can effectively communicate and manage patient care in a way that respects patients' varying needs.