Question: what is a prn in medical terms?
Answer: Using PRN or “As Needed” Medicines Safely. Some medications come with specific instructions for use every day, such as “Take 1 tablet by mouth every 8 hours.” ... Medicines that are taken “as needed” are known as “PRN” medicines. “PRN” is a Latin term that stands for “pro re nata,” which means “as the thing is needed.”