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From the Department of Neurology and Epileptology (Drs. de Haan, Engelsman, and Augustijn, M. Dévilé-Notschaele) and Laboratory of Clinical Chemistry and Clinical Pharmacology (Dr. Edelbroek, J. Segers), Epilepsy Institute of the Netherlands SEIN, Heemstede, The Netherlands; and DBG-Department of Medical Genetics (Dr. Lindhout), University Medical Center, Utrecht, The Netherlands.
Address correspondence and reprint requests to Dr. G-J. de Haan, Neurologist, SEIN, P.O. Box 21, 2100 AA Heemstede, The Netherlands; e-mail: gjdhaan{at}sein.nl
The authors describe 12 pregnancies in women with epilepsy using lamotrigine (LTG) monotherapy. A seizure increase in nine pregnancies was probably related to a gradual decline of LTG level-to-dose ratio to 40% of baseline. After delivery, LTG kinetics returned swiftly to baseline, causing toxic side effects in some women. Frequent LTG level monitoring and appropriate dose adjustments are advised in the period before and during pregnancy and after delivery, especially in women on LTG monotherapy.
Received January 5, 2004. Accepted in final form March 25, 2004.
G-J.H., P.E., M.E., and P.A. have contributed in the past to registration and postmarketing studies sponsored by GSK. D.L. is leader of the Benelux/Netherlands branch of the EURAP study, which is cosponsored by GSK. This report is unrelated to any of these studies and was not financially supported.
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Neurology 2004 63: 408-409.
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