A patient recently delivered via cesarean with epidural morphine; what should be available for safety?

• A. Naloxone
• B. Flumazenil
• C. Protamine sulfate
• D. Vitamin K

Answer: (A)

Opioid-related respiratory depression is a real safety concern after cesarean delivery when epidural morphine is used for pain relief. Naloxone is the antidote that should be readily available because it reverses opioid effects by competing for mu receptors, rapidly restoring ventilation when respiratory depression occurs. Its use should be titrated to reverse the depressant effect while trying to preserve some analgesia, and patients must be closely monitored for possible re-sedation or recurrence as morphine’s effects wane. In this setting, having naloxone ready is essential for maternal safety, and resuscitation equipment and oxygen should be available as well. The other agents don’t address opioid reversal: flumazenil reverses benzodiazepines, protamine sulfate reverses heparin, and vitamin K reverses warfarin.