What do systematic reviews say?

Dopamine antagonists vs placebo

It is very uncertain whether dopamine antagonists changes vomiting ‐ postoperative 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 0.63 [0.44, 0.92]
  9 studies · 860 participants
  Very low