A nurse is caring for a client who is experiencing respiratory depression after taking an excessive dose of oxycodone. Which of the following medications should the nurse expect to administer?

A. "Naloxone": Naloxone is an opioid antagonist used to reverse the effects of opioid overdose, including respiratory depression. It is the first-line medication to treat an overdose of oxycodone or any opioid. B. "Bisacodyl": Bisacodyl is a laxative used to relieve constipation, which is a common side effect of opioids, but it does not address respiratory depression and is not an appropriate treatment for opioid overdose. C. "Flumazenil": Flumazenil is a benzodiazepine antagonist used to reverse the effects of benzodiazepine overdose, not opioid overdose. It would not be effective for reversing the respiratory depression caused by oxycodone. D. "Pentazocine": Pentazocine is a mixed agonist-antagonist opioid used for pain relief, but it is not indicated for treating opioid overdose. It could actually worsen the situation by precipitating withdrawal symptoms in a client who has opioid dependence.