What do systematic reviews say?

Dopamine antagonists vs placebo

It is very uncertain whether dopamine antagonists changes nausea ‐ intraoperative compared with placebo (very low certainty).

• Interventions for preventing nausea and vomiting in women undergoing regional anaesthesia for caesarean section 2021 · Cochrane Headline outcomes only
  RR 0.38 [0.27, 0.52]
  15 studies · 1180 participants
  Very low