29th February 2024

An 18-year-old female complains of nausea and vomiting following a complicated appendectomy.

An 18-year-old female complains of nausea and vomiting following a complicated appendectomy. A patient-controlled analgesia (PCA) pump has been set up with an infusion of fentanyl in the postoperative period. There have been 2 episodes of non-bilious vomiting, causing the patient significant distress. The surgical registrar has prescribed the patient 4mg of IV ondansetron to treat the post-operative nausea and vomiting.

Which of the following side effects is most likely to occur as a result of treatment with IV ondansetron?