A nurse is reviewing a provider's prescription that reads: "Administer morphine sulfate 2 mg IV q4h PRN for pain." Which interpretation of the abbreviations demonstrates correct understanding?

A. Administer 2 mg of morphine sulfate intravenously every 4 hours as needed for pain: “IV” indicates intravenous administration. “q4h” means every 4 hours, and “PRN” signifies that the medication should be given only as needed based on the client’s reported pain. This interpretation correctly translates all components of the prescription. B. Administer 2 mg of morphine sulfate by mouth every 4 hours as needed for pain: “By mouth” would be abbreviated as PO, not IV. The prescription specifically indicates intravenous administration, which allows for rapid onset and precise titration. Misinterpreting the route could significantly alter onset, bioavailability, and clinical effect. C. Administer 2 mg of morphine sulfate intravenously every 4 hours without regard to pain: The abbreviation “PRN” means as needed, not scheduled regardless of symptoms. Administering morphine on a fixed schedule without assessing pain disregards the conditional nature of the order and may increase the risk of oversedation or respiratory depression. D. Administer 2 mg of morphine sulfate intramuscularly every 4 hours as needed for pain: Intramuscular administration is abbreviated as IM, not IV. Changing the route from intravenous to intramuscular would alter absorption rate, onset of action, and patient comfort. Accurate interpretation of route abbreviations is critical for safe medication administration.