Home support showed no clear difference in use of epidural or any regional anaesthesia compared with telephone triage (low certainty).
One‐to‐one structured care showed no clear difference in use of epidural or any regional anaesthesia compared with usual care (high certainty).
Assessment may leads to lower use of epidural or any regional anaesthesia compared with direct admission (low certainty).
5‐HT3 antagonists may leads to lower nausea ‐ intraoperative compared with placebo (low certainty).
It is very uncertain whether corticosteroids changes vomiting ‐ intraoperative compared with placebo (very low certainty).
Corticosteroids probably leads to lower nausea ‐ postoperative compared with placebo (moderate certainty).
Corticosteroids may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
Anticholinergics may leads to lower nausea ‐ intraoperative compared with placebo (low certainty).
It is very uncertain whether anticholinergics changes vomiting ‐ intraoperative compared with placebo (very low certainty).
It is very uncertain whether 5‐HT3 antagonists changes vomiting ‐ intraoperative compared with placebo (very low certainty).
Anticholinergics may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
Sedatives probably leads to lower nausea ‐ intraoperative compared with placebo (moderate certainty).
Sedatives probably leads to lower vomiting ‐ intraoperative compared with placebo (moderate certainty).
Sedatives may leads to lower vomiting ‐ postoperative compared with placebo (low certainty).
It is very uncertain whether acupressure/acupuncture changes nausea ‐ intraoperative compared with placebo (very low certainty).
Acupressure/acupuncture may leads to lower vomiting ‐ intraoperative 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 nausea ‐ intraoperative compared with placebo (very low certainty).
Dopamine antagonists may leads to lower vomiting ‐ intraoperative compared with placebo (low certainty).