The nurse administers naloxone to a client with opioid-induced respiratory depression. One hour later, nursing assessment reveals that the client has a respiratory rate of 4 breaths/minute, oxygen saturation of 75%, and is unable to be aroused. Which action should the nurse implement?

A. Initiate cardiopulmonary resuscitation (CPR): While initiating CPR is critical for clients experiencing cardiac or respiratory arrest, it is not the immediate action in this scenario. The client’s respiratory depression is most likely related to opioid toxicity, which can sometimes be reversed with naloxone. Before resorting to CPR, the priority is to address the potential cause of the respiratory depression. B. Prepare to assist with chest tube insertion: Chest tube insertion is typically indicated for conditions such as pneumothorax or pleural effusion, not for opioid-induced respiratory depression. In this case, the client’s symptoms are likely related to the effects of opioids and naloxone administration, not a need for chest tube insertion C. Determine Glasgow Coma Scale score: While assessing the Glasgow Coma Scale (GCS) score is important for evaluating the client's level of consciousness and neurological status, it does not address the immediate need to counteract opioid toxicity. The priority is to manage the respiratory depression that could be life-threatening. D. Administer a second dose of naloxone: Administering a second dose of naloxone is the most appropriate action in this scenario. Naloxone is used to reverse opioid-induced respiratory depression, and if the initial dose did not fully counteract the effects of the opioid, a second dose may be necessary. The client's severe respiratory depression and low oxygen saturation indicate that opioid effects may still be present, warranting additional naloxone administration.