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Valproate in the treatment of absence epilepsy in children: a study of dose-response relationships
G Braathen1, K Theorell, A Persson
1Department of Pediatrics, Karolinska Institute, Huddinge University Hospital, Sweden.
Insights
Valproate (VPA) effectively treated absence epilepsy in children, with most becoming seizure-free. Achieving a plasma concentration of 440-660 microM VPA correlated with significant seizure reduction.
Area of Science:
- Pediatric Neurology
- Clinical Pharmacology
Background:
- Absence epilepsy is a common epilepsy syndrome in children.
- Valproate (VPA) is a broad-spectrum antiepileptic drug used for various seizure types.
Purpose of the Study:
- To evaluate the efficacy of valproate monotherapy in children with absence epilepsy.
- To determine the correlation between plasma VPA concentration and seizure reduction.
Main Methods:
- Seven children diagnosed with absence epilepsy were included in the study.
- VPA monotherapy was administered, and EEG monitoring was performed before and during treatment.
- Plasma VPA concentrations were measured and correlated with seizure frequency and EEG findings.
Main Results:
- Six out of seven children achieved complete freedom from absence seizures with VPA monotherapy.
- A significant positive correlation was found between plasma VPA concentration and the reduction in epileptic discharges.
- A plasma VPA concentration of 440-660 microM was associated with at least a 50% reduction in seizure activity.
Conclusions:
- Valproate monotherapy is highly effective in achieving seizure control in pediatric absence epilepsy.
- Therapeutic drug monitoring of plasma VPA levels is crucial for optimizing treatment efficacy and achieving seizure freedom.
Abstract:
Seven children with absence epilepsy were treated with valproate (VPA). All but one child became free of absence seizures during VPA monotherapy. EEG was recorded for 24 h before start of VPA treatment and repeatedly during treatment. Correlation between plasma VPA concentration and reduction of the number of epileptic discharges was significant. Plasma concentration of 440-660 microM VPA was needed to achieve at least 50% reduction of seizure activity.