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“BackgroundAntiepileptic drugs (AEDs) like phenytoin (PHE), carbamazepine (CBZ), barbiturates and valproic acid (VPA) interfere with folic acid absorption and metabolism, which in turn can be the cause of adverse pregnancy outcome.”
“All women taking valproate and carbamazepine are advised to take 4 mg/day of folic acid at least one month before pregnancy and during the first trimester.”
“We recommend combination therapy of carbamazepine and folic acid in the treatment of patients, especially elderly patients with lesions involving the mandibular division of the trigeminal nerve.”