Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,514 questions · 1,543 findings · 649 reviews

No studies found 224 · 14.5%GRADE not reported 105 · 6.8%Very low 383 · 24.8%Low 447 · 29%Moderate 293 · 19%High 91 · 5.9%

Zinc vs placebo

Adverse events · Patients with taste disturbances (dysgeusia/hypogeusia; idiopathic, zinc-deficient, or secondary to chronic renal failure)

It is very uncertain whether zinc supplements (zinc sulphate, zinc gluconate, zinc picolinate,… changes adverse events compared with placebo (very low certainty).

1 finding from 1 review

Preoperative ibuprofen vs placebo

Adverse events · Children and adolescents having orthodontic separator placement (without local anaesthetic)
1 finding from 1 review

Opioids vs placebo

Adverse events · RLS

Opioids may leads to higher adverse Events compared with placebo (low certainty).

1 finding from 1 review