A nurse is caring for a client who is 12 hr postoperative following abdominal surgery and has received hydromorphone for pain. The nurse notes that the client's respiratory rate is 10/min. Which of the following prescribed medications should the nurse anticipate administering to the client?

Hydromorphone is a potent opioid analgesic that provides relief through the stimulation of mu-opioid receptors in the central nervous system. A dangerous side effect is respiratory depression, where the drug decreases the responsiveness of brainstem respiratory centers to carbon dioxide levels. Rationale: A. Prednisone is a corticosteroid used for its anti-inflammatory and immunosuppressive properties. It has no pharmacological ability to reverse the central nervous system depression caused by opioid agonists like hydromorphone. Administering prednisone to a client with a depressed respiratory rate would provide no benefit in managing the immediate risk of respiratory failure or apnea. B. Naloxone is an opioid antagonist that competitively binds to mu-opioid receptors, rapidly displacing opioid molecules like hydromorphone. It is the gold standard for reversing opioid-induced respiratory depression, restoring a normal breathing rate and level of consciousness within minutes. The nurse must monitor the client closely after administration, as the half-life of naloxone is shorter than hydromorphone. C. Epinephrine is a catecholamine used in the treatment of anaphylaxis, cardiac arrest, and severe hypotension. While it can stimulate the cardiovascular system, it is not a reversal agent for opioid toxicity. Using epinephrine for a depressed respiratory rate would not address the underlying receptor-level blockade causing the decreased ventilation and could cause unnecessary cardiac strain. D. Flumazenil is a benzodiazepine antagonist used specifically to reverse the effects of drugs like diazepam or midazolam. It does not bind to opioid receptors and therefore cannot reverse the respiratory depression caused by hydromorphone. The nurse must correctly identify the offending drug class to ensure the proper antagonist is selected for emergency intervention.