What does the abbreviation "PRN" signify on a prescription?

The abbreviation "PRN" stands for "pro re nata," a Latin term that translates to "as needed." This indicates that the medication should be taken only when necessary, rather than on a regular schedule. This is commonly seen in prescriptions for pain relievers, sleep aids, or other medications where the patient’s discretion is essential in determining the need for the drug. By using "PRN," healthcare providers give patients the flexibility to manage their own symptoms or conditions based on their individual needs and circumstances, thus emphasizing patient autonomy and effective symptom management.

The other options describe more specific instructions regarding frequency or conditions for taking the medication, but they do not capture the intended meaning of "PRN."