A 48-year-old woman receives epidural anesthesia for a vaginal hysterectomy. In addition, a fentanyl infusion was given epidurally to relieve postoperative pain. Six hours later, the woman began complaining of nausea and had two episodes of vomiting.

How can nausea and vomiting be relieved? *This Case Challenge is from the Editorial team of Docplexus and is meant for educational purposes only.