A nurse is assessing a client who received hydromorphone 4 mg IV 15 min ago. The client has a respiratory rate of 10/min. The nurse should prepare to administer which of the following medications?

A. Flumazenil is used for benzodiazepine overdose, not opioid overdose. B. Naloxone is the antidote for opioid overdose and is indicated here due to the low respiratory rate and recent administration of hydromorphone. C. Acetylcysteine is used for acetaminophen overdose, not opioids. D. Protamine is used to reverse heparin, not opioids.