Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

71 questions · 71 findings · 8 reviews

No studies found 16 · 22.5%GRADE not reported 0 · 0%Very low 33 · 46.5%Low 14 · 19.7%Moderate 7 · 9.9%High 1 · 1.4%

Levetiracetam vs placebo

50% or greater reduction in focal seizure frequency (responders) intention to treat– all doses · people with drug‐resistant focal epilepsy

Levetiracetam probably leads to higher 50% or greater reduction in focal seizure frequency (responders)… compared with placebo (moderate certainty).

1 finding from 1 review

Levetiracetam vs placebo

Somnolence · people with drug‐resistant focal epilepsy

Levetiracetam probably leads to higher adverse effects: 5 most common adverse effects (any age) – somnolence compared with placebo (moderate certainty).

1 finding from 1 review

Levetiracetam vs placebo

Adverse effects: headache · people with drug‐resistant focal epilepsy

Levetiracetam showed no clear difference in adverse effects: 5 most common adverse effects (any age) – headache compared with placebo (low certainty).

1 finding from 1 review

Levetiracetam vs placebo

Adverse effects: 5 most common adverse effects (any age) – dizziness · people with drug‐resistant focal epilepsy

Levetiracetam showed no clear difference in adverse effects: 5 most common adverse effects (any age) – dizziness compared with placebo (moderate certainty).

1 finding from 1 review

Levetiracetam vs placebo

Adverse effect: fatigue · people with drug‐resistant focal epilepsy

Levetiracetam showed no clear difference in adverse effects: 5 most common adverse effects (any age) – fatigue… compared with placebo (moderate certainty).

1 finding from 1 review

Levetiracetam vs placebo

Adverse effects: 5 most common adverse effects (any age) – accidental injury · people with drug‐resistant focal epilepsy

Levetiracetam showed no clear difference in adverse effects: 5 most common adverse effects (any age) –… compared with placebo (low certainty).

1 finding from 1 review

Levetiracetam vs phenobarbital

50% or greater reduction in seizure frequency · patients with AD and epileptic seizures

It is very uncertain whether levetiracetam changes reduction in seizure frequency of 50% or more compared with phenobarbital (very low certainty).

1 finding from 1 review

Levetiracetam vs lamotrigine

50% or greater reduction in seizure frequency · patients with AD and epileptic seizures

It is very uncertain whether levetiracetam changes reduction in seizure frequency of 50% or more compared with lamotrigine (very low certainty).

1 finding from 1 review