Final answer:
PRN stands for 'pro re nata,' which means 'as needed.' When taking medication PRN, it means the medication should be taken only when necessary and not on a set schedule.
Step-by-step explanation:
PRN stands for 'pro re nata,' which is a Latin phrase that translates to 'as needed.' When taking medication, PRN means that the medication should be taken only when necessary and not on a set schedule. This is often used for medications that provide relief from pain, allergies, or other symptoms that may fluctuate throughout the day.
For example, if a person is prescribed a pain medication PRN, they can take it when they experience pain, rather than taking it at fixed intervals. It allows the individual to have more control over their medication usage and only take it when they truly need it. It is important to follow the specific instructions provided by the healthcare professional or pharmacist when taking medication PRN.