Final answer:
The nurse should prepare to administer Naloxone to reverse respiratory depression caused by Morphine, as it can quickly antagonize the effects of opioids and restore normal breathing.
Step-by-step explanation:
The patient is experiencing respiratory depression after receiving Morphine for pain. In such a case, the nurse should prepare to administer Naloxone. Naloxone, an opioid antagonist, is used to reverse the effects of opioids, including morphine. It works by binding to opioid receptors and blocking the effects of opioids, which includes relief from pain and respiratory depression. Naloxone is known for its ability to quickly reverse respiratory depression caused by opioid overdose and is administered parenterally.