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%

Sulfasalazine vs placebo

Serious adverse events · Patients with ankylosing spondylitis

Sulfasalazine showed no clear difference in serious adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Allopurinol vs placebo

Serious adverse events · people with chronic gout

Allopurinol showed no clear difference in serious adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Ascorbic acid vs placebo

Serious adverse events · people with fatigue in peripheral neuropathy

Ascorbic acid showed no clear difference in serious adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Xiongshao capsule (XSC) plus conventional western medicine (CWM) vs conventional western medicine (CWM) plus placebo

Serious adverse events · patients with restenosis after percutaneous coronary intervention in coronary heart disease

Xiongshao capsule (XSC) plus conventional western medicine (CWM) leads to lower serious adverse events compared with conventional western medicine (CWM) plus placebo (high certainty).

1 finding from 1 review

Pregabalin vs placebo at end of treatment

Serious adverse events · patients with fibromyalgia

Pregabalin showed no clear difference in serious adverse events compared with placebo at end of treatment (moderate certainty).

1 finding from 1 review