A nurse is caring for a client who overdosed on morphine and has a respiratory rate of 6/min. Which medication should the nurse plan to administer?

A. Epinephrine is primarily used for anaphylaxis and severe asthma attacks; it is not effective in reversing opioid overdose. B. Protamine is an antidote for heparin, not for opioid overdose. C. Flumazenil is a benzodiazepine antagonist and is not indicated for opioid overdose; it can potentially precipitate seizures in patients with mixed drug overdoses. D. Naloxone is an opioid antagonist specifically indicated for reversing the effects of opioid overdose, including respiratory depression, making it the appropriate choice in this scenario.