A nurse is monitoring a client who received naloxone to counteract the effects of an opioid overdose. Which of the following findings should indicate to the nurse that the medication is effective?

A. Increased respiratory rate is a sign that naloxone is effectively reversing opioid-induced respiratory depression. Opioids can suppress the respiratory drive, leading to hypoventilation or respiratory arrest. Naloxone works by competitively binding to opioid receptors and displacing opioids, thereby restoring normal respiratory function. B. Increased temperature is not a direct effect of naloxone administration. Naloxone primarily reverses the central nervous system depressant effects of opioids, including respiratory depression and sedation, rather than affecting body temperature. C. Naloxone does not directly affect pain perception. Its primary action is to reverse the respiratory depression and central nervous system depression caused by opioids. While the client may experience pain relief indirectly as a result of improved respiratory function and consciousness, naloxone itself does not directly reduce pain. D. Decreased blood pressure is not a direct effect of naloxone administration. Naloxone primarily reverses the respiratory and central nervous system depressant effects of opioids, rather than affecting blood pressure directly.