Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

196 questions · 200 findings · 52 reviews

No studies found 69 · 34.5%GRADE not reported 24 · 12%Very low 75 · 37.5%Low 27 · 13.5%Moderate 5 · 2.5%High 0 · 0%

Acupuncture vs sham

Adverse events · Adults with dry mouth due to radiotherapy (head and neck cancer) or Sjogren's Syndrome
1 finding from 1 review

Acetaminophen plus Diphenhydrammine vs placebo (Unit of randomisation: transfusion)

Adverse events · patients with requirement of prophylaxis to avoid allergic and febrile non‐haemolytic transfusion reactions

Acetaminophen plus Diphenhydrammine led to lower adverse events compared with placebo (Unit of randomisation: transfusion); GRADE not reported.

1 finding from 1 review

Acetaminophen plus Diphenhydramine vs placebo

Adverse events · patients with requirement of prophylaxis to avoid allergic and febrile non‐haemolytic transfusion reactions

Acetaminophen plus Diphenhydramine led to lower adverse events compared with placebo; GRADE not reported.

1 finding from 1 review