Using epilepsy drug valproate during pregnancy was significantly associated with a 48% increased risk of attention-deficit/hyperactivity disorder (ADHD) compared with children with no valproate exposure (n = 913,302).

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Using epilepsy drug valproate during pregnancy was significantly associated with a 48% increased risk of attention-deficit/hyperactivity disorder (ADHD) compared with children with no valproate exposure (n = 913,302).