The abbreviation "prn" is used to indicate what instruction?

The abbreviation "prn" stands for "pro re nata," which is a Latin term meaning "as needed." This instruction is commonly used in medical prescriptions and documentation to indicate that a medication or intervention should be administered only when necessary, rather than at scheduled intervals. For example, a patient might be prescribed a pain reliever "prn," meaning they should take it when they experience pain, rather than taking it on a fixed schedule. This instruction allows for flexibility in patient care, ensuring that treatments are tailored to individual needs and circumstances.