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Hoeltzenbein, Maria; Bartz, Insa; Fietz, Anne‐Katrin; Lohse, Lukas; Onken, Marlies; Dathe, Katarina; Schaefer, Christof
Epilepsia (Copenhagen), January 2024, 2024-Jan, 2024-01-00, 20240101, Letnik: 65, Številka: 1Journal Article
Objective Levetiracetam is increasingly used in pregnant women with epilepsy. Although teratogenic effects have not been observed so far, data on the risks of spontaneous abortion and major birth defects are still limited, especially for the frequently used dual therapy of levetiracetam and lamotrigine. Our primary aim was to analyze rates of major birth defects and spontaneous abortion after maternal levetiracetam treatment. Methods This was a cohort study based on pregnancies recorded by the Embryotox Center from 2000 to 2017. Outcomes of prospectively ascertained pregnancies with first trimester levetiracetam monotherapy (n = 221) were compared to pregnancies with lamotrigine monotherapy for epilepsy (n = 469). In addition, all pregnancies with levetiracetam (n = 364) exposure during the first trimester were analyzed in comparison to a nonexposed cohort (n = 729). Pregnancies with the most frequently used combination therapy comprising levetiracetam and lamotrigine (n = 80) were evaluated separately. Results There was no significantly increased risk of major birth defects or of spontaneous abortions after first trimester exposure to levetiracetam. Birth weight of male neonates was significantly lower after levetiracetam monotherapy compared to lamotrigine monotherapy. Dual therapy with levetiracetam and lamotrigine resulted in a significantly increased risk of spontaneous abortion (adjusted hazard ratio = 3.01, 95% confidence interval CI = 1.43–6.33) and a nonsignificant effect estimate for major birth defects (7.7%, n = 5/65, adjusted odds ratio = 1.47, 95% CI = .48–4.47) compared to a nonexposed cohort. Significance Our study confirms the use of levetiracetam as a suitable antiepileptic drug in pregnancy. The lower birth weight of male neonates after maternal levetiracetam monotherapy and the unexpectedly high risk of spontaneous abortion and birth defects after dual therapy with levetiracetam and lamotrigine require further investigation.
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