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Adverse response to methylphenidate in combination with valproic acid.
1Child Development Centre, The Hospital for Sick Children, Toronto, Ontario, Canada.
Journal of Child and Adolescent Psychopharmacology
|April 8, 2000
Summary
Methylphenidate (MPH) combined with valproic acid may cause severe adverse effects like dyskinesia in children with epilepsy and ADHD. Caution is advised when using this medication combination due to potential serious side effects.
Area of Science:
- Pediatric Neurology
- Child Psychiatry
- Clinical Pharmacology
Background:
- Attention-deficit hyperactivity disorder (ADHD) is common in children with epilepsy.
- Methylphenidate (MPH) is increasingly used for ADHD symptoms in epileptic children.
- Valproic acid is a common antiepileptic drug (AED) used in this population.
Purpose of the Study:
- To report adverse effects of combining methylphenidate (MPH) with valproic acid in children.
- To highlight potential risks associated with this common co-prescription.
Main Methods:
- Case report of two children with epilepsy and ADHD.
- Observation of adverse events following MPH administration while on valproic acid therapy.
Main Results:
- Two children developed rapid and severe dyskinesia and bruxism.
- These adverse effects occurred when MPH was co-administered with valproic acid.
Conclusions:
- Caution is warranted when prescribing MPH for ADHD in children taking valproic acid.
- Potential for serious and persistent side effects necessitates careful monitoring.
- Further prospective studies are needed to evaluate the safety of valproic acid and MPH combination.