How is PRN typically used in patient care orders?

• A. STAT.
• B. As needed.
• C. Immediately after meals.
• D. Every hour.

Answer: (B)

PRN means “as needed.” In patient care orders, a PRN instruction allows the nurse to give the medication when the patient shows symptoms the medication is meant to treat, rather than on a fixed schedule. This approach is common for drugs like analgesics, antiemetics, or rescue meds, where dosing depends on how the patient feels or what symptoms are present. The nurse assesses the patient, determines if the symptom meets the criteria for use, administers the dose per the order, and documents effectiveness and any side effects. This differs from a STAT order, which is an urgent, one-time dose; from a schedule tied to meals, which requires timing with eating; and from a fixed hourly order, which is a rigid interval. Always consider the specific limits on the PRN order, such as maximum daily doses and any safety precautions.