Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

80 questions · 82 findings · 13 reviews · Epilepsy

No studies found 8 · 9.8%GRADE not reported 0 · 0%Very low 3 · 3.7%Low 29 · 35.4%Moderate 31 · 37.8%High 11 · 13.4%

Sodium valproate vs phenytoin monotherapy

Time to treatment failure (any reason related to treatment) All participants Range of · adults and children with newly‐onset focal onset or generalised tonic‐clonic seizures

Sodium valproate showed no clear difference in time to treatment failure (any reason related to treatment) All… compared with phenytoin monotherapy (moderate certainty).

1 finding from 1 review

Sodium valproate vs phenytoin monotherapy

Time to treatment failure (any reason related to treatment) Subgroup: focal onset seizures Range of · adults and children with newly‐onset focal onset or generalised tonic‐clonic seizures

Sodium valproate showed no clear difference in time to treatment failure (any reason related to treatment)… compared with phenytoin monotherapy (moderate certainty).

1 finding from 1 review

Sodium valproate vs phenytoin monotherapy

Time to first seizure (post‐randomisation) All participants Range of · adults and children with newly‐onset focal onset or generalised tonic‐clonic seizures

Sodium valproate showed no clear difference in time to first seizure (post‐randomisation) All participants Range of compared with phenytoin monotherapy (low certainty).

1 finding from 1 review

Sodium valproate vs phenytoin monotherapy

Time to first seizure (post‐randomisation) Subgroup: focal onset seizures Range of · adults and children with newly‐onset focal onset or generalised tonic‐clonic seizures

Sodium valproate showed no clear difference in time to first seizure (post‐randomisation) Subgroup: focal onset… compared with phenytoin monotherapy (low certainty).

1 finding from 1 review

Sodium valproate vs phenytoin monotherapy

Remission · adults and children with newly‐onset focal onset or generalised tonic‐clonic seizures

Sodium valproate showed no clear difference in time to achieve 12‐month remission (seizure‐free period) All… compared with phenytoin monotherapy (moderate certainty).

1 finding from 1 review

Sodium valproate vs phenytoin monotherapy

Time to achieve 12‐month remission (seizure‐free period) Subgroup: focal onset seizures Range of · adults and children with newly‐onset focal onset or generalised tonic‐clonic seizures

Sodium valproate showed no clear difference in time to achieve 12‐month remission (seizure‐free period) Subgroup:… compared with phenytoin monotherapy (moderate certainty).

1 finding from 1 review

Oxcarbazepine vs phenytoin

Time to 12‐month remission ‐ stratified by epilepsy type ‐ generalised onset Range of · people with newly diagnosed epilepsy

Summary of findings: oxcarbazepine showed no clear difference in time to achieve 12‐month remission (seizure‐free period) Subgroup:… compared with phenytoin (secondary outcomes) (low certainty).

1 finding from 1 review

Oxcarbazepine vs phenytoin

Time to treatment failure (any reason related to treatment) Subgroup: generalised onset seizures Range of · people with newly diagnosed epilepsy

Summary of findings: oxcarbazepine showed no clear difference in time to treatment failure (any reason related to treatment)… compared with phenytoin (primary outcomes) (moderate certainty).

1 finding from 1 review

Oxcarbazepine vs phenytoin

Time to first seizure (post‐randomisation) Subgroup: generalised onset seizures Range of · people with newly diagnosed epilepsy

Summary of findings: oxcarbazepine showed no clear difference in time to first seizure (post‐randomisation) Subgroup: generalised… compared with phenytoin (secondary outcomes) (low certainty).

1 finding from 1 review

Clobazam vs phenytoin

Seizure freedom · drug‐naïve people with focal or generalized seizures with solitary cysticercus granuloma

The review found no eligible studies for this question.

2 findings from 1 review

Clobazam vs phenytoin

Adverse effects requiring withdrawal/discontinuation of study medication · drug‐naïve people with focal or generalized seizures with solitary cysticercus granuloma

Clobazam showed no clear difference in adverse effects requiring withdrawal/discontinuation of study… compared with phenytoin (low certainty).

1 finding from 1 review

Clobazam vs carbamazepine

Seizure freedom · people with focal or generalized seizures

Clobazam showed no clear difference in seizure freedom at 4 weeks compared with carbamazepine (low certainty).

2 findings from 1 review