Findings

What do systematic reviews say?

6 questions · 7 findings · 4 reviews · ENT

No studies found 2 · 28.6%GRADE not reported 0 · 0%Very low 2 · 28.6%Low 1 · 14.3%Moderate 2 · 28.6%High 0 · 0%

Other adverse effects · people with olfactory dysfunction for less than 4 weeks following COVID‐19 infection

1 finding from 1 review

Interventions for the prevention of persistent post‐COVID‐19 olfactory dysfunction 2022 · Cochrane Headline outcomes only
no estimate extracted
1 study · 77 participants
Very low

Other adverse effects · participants with olfactory dysfunction following COVID‐19 for ≤ 15 days

The review found no eligible studies for this question.

1 finding from 1 review

Interventions for the prevention of persistent post‐COVID‐19 olfactory dysfunction 2022 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Adverse effects: serious or other · adults with nasal haemorrhage (epistaxis)

The review found no eligible studies for this question.

1 finding from 1 review

Tranexamic acid for patients with nasal haemorrhage (epistaxis) 2018 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Other adverse effects (yes or no) · patients with subjective idiopathic tinnitus

2 findings from 1 review

Betahistine for tinnitus 2018 · Cochrane Headline outcomes only
no estimate extracted
1 study · 11 participants
Very low
Betahistine for tinnitus 2018 · Cochrane Headline outcomes only
no estimate extracted
1 study · 41 participants
Moderate

Other adverse effects (yes or no) · patients with subjective idiopathic tinnitus

1 finding from 1 review

Betahistine for tinnitus 2018 · Cochrane Headline outcomes only
no estimate extracted
1 study · 59 participants
Moderate

Other adverse effects (gastrointestinal upset, headache, allergic reaction) · adults with tinnitus

Ginkgo biloba showed no clear difference in other adverse effects (gastrointestinal upset, headache, allergic… compared with placebo (low certainty).

1 finding from 1 review

Ginkgo biloba for tinnitus 2022 · Cochrane Headline outcomes only
RR 0.91 [0.52, 1.6]
4 studies · 1175 participants
Low