What do systematic reviews say?

5‐HT3 antagonists vs placebo

5‐HT3 antagonists may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).

• Interventions for preventing nausea and vomiting in women undergoing regional anaesthesia for caesarean section 2021 · Cochrane Headline outcomes only
  RR 0.47 [0.31, 0.69]
  10 studies · 1450 participants
  Low