What do systematic reviews say?

Anticholinergic medication vs placebo

Anticholinergics may leads to lower nausea ‐ intraoperative 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 0.67 [0.51, 0.87]
  4 studies · 453 participants
  Low