Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,756 questions · 11,779 findings · 747 reviews · Headline outcomes only

No studies found 3,205 · 27.2%GRADE not reported 628 · 5.3%Very low 3,261 · 27.7%Low 2,913 · 24.7%Moderate 1,453 · 12.3%High 319 · 2.7%

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Intranasal steroid spray vs placebo or no intervention

Change in sense of smell · people with olfactory dysfunction for less than 4 weeks following COVID‐19 infection
3 findings from 1 review

5‐HT3 antagonists vs placebo

Nausea · women undergoing regional anaesthesia for caesarean section

5‐HT3 antagonists may leads to lower nausea ‐ intraoperative compared with placebo (low certainty).

2 findings from 1 review

Corticosteroids vs placebo

Nausea · women undergoing regional anaesthesia for caesarean section

Corticosteroids probably leads to lower nausea ‐ postoperative compared with placebo (moderate certainty).

2 findings from 1 review

Anticholinergic medication vs placebo

Nausea · women undergoing regional anaesthesia for caesarean section

Anticholinergics may leads to lower nausea ‐ intraoperative compared with placebo (low certainty).

2 findings from 1 review

Sedation vs placebo

Nausea · women undergoing regional anaesthesia for caesarean section

Sedatives probably leads to lower nausea ‐ intraoperative compared with placebo (moderate certainty).

2 findings from 1 review

Acupuncture or acupressure vs placebo

Nausea · women undergoing regional anaesthesia for caesarean section

It is very uncertain whether acupressure/acupuncture changes nausea ‐ intraoperative compared with placebo (very low certainty).

2 findings from 1 review