A client is receiving morphine sulfate via a patient-controlled analgesia (PCA) pump postoperatively. Which assessment finding should prompt the nurse to administer a prescribed PRN dose of naloxone?

A. Expresses that they cannot get enough air to breathe: While this is concerning, it is less specific than a respiratory rate finding for opioid overdose. B. Respiratory rate of 7 breaths/minute: This indicates severe respiratory depression, a critical sign of opioid overdose, which necessitates immediate administration of naloxone. C. Intercostal retractions and bilateral wheezing on auscultation: These signs suggest respiratory distress but do not directly indicate an opioid overdose. D. Pulse oximeter reading of 89% on room air: While low, this reading does not specifically indicate opioid overdose unless accompanied by respiratory depression.