After giving naloxone, which signs indicate improvement?

• A. Improved heart rate and improved color.
• B. Worsened confusion and decreased respirations.
• C. Improved respirations, improved mentation, and better oxygen saturation.
• D. No change in condition.

Answer: (C)

Naloxone reverses opioid-induced respiratory and central nervous system depression, so improvement after administration is seen as restoration of normal breathing and mental function. The best signs are improved respirations (more regular, deeper, or faster breathing), better mentation (alert, oriented, responsive), and higher oxygen saturation as gas exchange improves. These reflect the reversal of the opioid effects on brainstem drives and airway control, allowing the person to oxygenate and wake up.

Worsened confusion with decreased respirations would indicate that reversal isn’t sufficient or that more naloxone is needed, and no change means the reversal hasn’t taken effect yet. Improved heart rate or color can occur, but they aren’t as reliable or direct indicators of reversal as breathing, consciousness, and oxygen saturation.