HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Correspondence: Submit a response Alert me when this article is cited Alert me when Correspondence are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Lombroso, C. T. Search for Related Content PubMed PubMed Citation Articles by Lombroso, C. T.

Lamotrigine-induced tourettism

From the Department of Neurology, Children’s Hospital, and Harvard Medical School, Boston, MA.

Address correspondence and reprint requests to Dr. Cesare T. Lombroso, 319 Longwood Avenue, Boston, MA 02115.

BACKGROUND: Lamotrigine (LTG) has a broad spectrum of antiepileptic efficacy and generally benign side effects except for idiosyncratic rashes.

OBJECTIVE: Three children are described in whom LTG caused dose-related Tourette syndrome (TS) symptoms. Although undoubtedly rare, this interesting phenomenon supports the mounting evidence in favor of the multifactorial genesis of TS symptoms.

RESULTS: The main known antiseizure mechanism of LTG is to block excessive presynaptic release of excitatory amino acids (EAAs), which occurs when there are sustained neuronal burst firings, as happens within epileptogenic brain tissue. LTG does not prevent the spontaneous release of EAAs and thus does not affect their normal functions.

CONCLUSIONS: Among the many proposed explanations for the pathogenesis of TS is the dopamine hypothesis: a dysfunction in dopamine uptake in the striatum. EAAs can also interfere with striatal dopamine uptake. Conceivably, LTG may cause TS symptoms by failing, at high doses, to regulate the presynaptic release of EAAs in the striatum properly.

This article has been cited by other articles:

				J. H. Cross Reply to Zesiewicz et al J Child Neurol, April 1, 2006; 21(4): 357 - 358. [PDF]

				F. SEEMULLER, S. DEHNING, H. GRUNZE, and N. MULLER Tourette's Symptoms Provoked by Lamotrigine in a Bipolar Patient Am J Psychiatry, January 1, 2006; 163(1): 159 - 159. [Full Text] [PDF]

				K. B. Das, C. Harris, D. P. L. Smyth, and J. H. Cross Unusual Side Effects of Lamotrigine Therapy J Child Neurol, July 1, 2003; 18(7): 479 - 480. [Abstract] [PDF]

				M. Bebin Pediatric Partial and Generalized Seizures J Child Neurol, January 1, 2002; 17(1_suppl): S65 - S69. [Abstract] [PDF]