What does the medical abbreviation "PRN" stand for?

The abbreviation "PRN" originates from the Latin phrase "pro re nata," which translates to "as needed." In a medical context, it indicates that a medication or treatment should be administered only when necessary, rather than on a scheduled basis. This means that if a patient is experiencing symptoms or requires intervention, the healthcare provider can dispense the medication at that time, rather than at set intervals. This allows for more personalized and responsive patient care based on individual needs.

For example, a doctor might prescribe pain medication to be taken PRN, meaning the patient can take it when they feel pain, rather than taking it on a regular schedule. This practice helps to avoid over-medication and ensures that patients receive care that is tailored to their current condition. In contrast, the other options do not accurately capture the meaning of PRN in a clinical setting.