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Practical management of therapeutic diphenylhydantoin concentrations in children
A Smit1, J F Schoeman, H I Seifart
1Department of Paediatrics and Child Health, University of Stellenbosch, Tygerberg, W Cape.
Insights
This study developed practical methods to manage diphenylhydantoin (DPH) levels in children with epilepsy. Individualized dosing based on pharmacokinetic parameters effectively controlled seizures, simplifying long-term treatment.
Area of Science:
- Pediatric Pharmacology
- Clinical Pharmacy
- Epileptology
Background:
- Therapeutic drug monitoring of diphenylhydantoin (DPH) is crucial for managing pediatric epilepsy.
- Existing DPH dosage regimens in children often lead to suboptimal seizure control.
- Need for practical, individualized DPH management strategies in pediatric patients.
Purpose of the Study:
- To develop easy and practical methods for managing and optimizing therapeutic diphenylhydantoin (DPH) concentrations in children.
- To determine individual-specific DPH maintenance dosage and volume of distribution data for routine therapeutic drug management.
Main Methods:
- Investigated DPH concentration profiles and pharmacokinetic parameters in children (4-12 years) with poorly controlled epilepsy on DPH monotherapy.
- Calculated individual-specific DPH maintenance dosage and volume of distribution.
- Utilized data for routine therapeutic concentration management procedures.
Main Results:
- Epilepsy was inadequately controlled in all subjects due to insufficient DPH dosage regimens.
- Individual-specific DPH maintenance dosage and volume of distribution data were successfully calculated for all participants.
- Calculated data proved suitable for routine management, with no need for parameter recalculation over a 12-month follow-up.
Conclusions:
- Satisfactory management of therapeutic DPH concentration profiles in children is achievable.
- Deriving and skillfully applying individual-specific DPH pharmacokinetic parameters is key to effective epilepsy management in pediatric populations.
Objective:
Development of easy, practical methods for the management and optimisation of therapeutic diphenylhydantoin (DPH) concentrations in children.
Design:
Investigation of DPH concentration profiles and pharmacokinetic parameters in children with poorly controlled epilepsy. Subsequent determination of individual-specific DPH maintenance dosage and volume of distribution data suitable for use in routine therapeutic concentration management procedures.
Setting:
Department of Paediatrics and Child Health and Department of Pharmacology, University of Stellenbosch, Tygerberg Hospital.
Subjects:
Children of both sexes between the ages of 4 and 12 years with poorly controlled epilepsy receiving DPH as sole medication.
Results:
In all subjects evaluated epilepsy was unsatisfactorily controlled because of inadequate DPH dosage regimens. Individual-specific maintenance dosage and volume of distribution data could be calculated for all individuals participating in the trial. The calculated data were suitable for use in routine management procedures and in no instance was it necessary to recalculate parameters in a 12-month follow-up period subsequent to evaluation.
Conclusions:
Therapeutic DPH concentration profiles can be managed satisfactorily in children in individual-specific DPH pharmacokinetic parameters are derived and skillfully applied.