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Effect of Valproic Acid Therapy on Zinc Metabolism in Children with Primary Epilepsy

Summary:The effect of long-term treatment with valproic acid (VPA) on zinc (Zn) metabolism was studied in 15 children with absence seizures. During treatment with VPA the erythrocyte Zn content was significantly lower than that found in controls matched for sex and age. Plasma and urine values of Zn and of copper were within normal limits. It is suggested that the anticonvulsive action of VPA may be mediated through its effect on the metabolism of Zn in the brain and the concomitant changes in the activity of the enzymes glutamic acid decarboxylase and carbonic anhydrase.