What defines PRN medications?

PRN medications are defined as those that are administered as needed or if necessary. This means that these medications are not given on a strict schedule; instead, they are provided based on the patient's specific circumstances or symptoms. For instance, if a patient is in pain, a PRN medication may be taken to alleviate that pain, but it would not be taken at regular intervals unless the pain arises again. This flexibility is essential in providing tailored care that responds to the actual needs of the patient.

In contrast, medications that are administered at scheduled times are not considered PRN, as they follow a regular dosing schedule regardless of the patient’s immediate condition. Additionally, while some PRN medications may be over-the-counter, this is not a defining characteristic, as PRN prescriptions can also include prescription medications. Lastly, while a physician typically prescribes PRN medications, the requirement for a prescription does not define their PRN nature; it's the "as needed" administration that is key.