Corticosteroids may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
Anticholinergics may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
Sedatives may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
It is very uncertain whether acupressure/acupuncture changes vomiting ‐ postoperative compared with placebo (very low certainty).
5‐HT3 antagonists may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
It is very uncertain whether dopamine antagonists changes vomiting ‐ postoperative compared with placebo (very low certainty).
It is very uncertain whether antihistamines changes vomiting ‐ postoperative compared with placebo (very low certainty).
Opioid antagonists showed no clear difference in vomiting ‐ postoperative compared with placebo (low certainty).
It is very uncertain whether ginger changes vomiting ‐ postoperative compared with placebo (very low certainty).