• F Van den Eynde, K H Naudts, S De Saedeleer, C van Heeringen, and K Audenaert.
• Department of Psychiatry and Medical Psychology, Ghent University Hospital, Ghent University, Belgium. Frederique.VandenEynde@UGent.be
• Acta Neurol Belg. 2005 Dec 1;105(4):206-11.

UnlabelledAlthough there only have been a limited number of double-blind, placebo controlled trials, antipsychotics are considered to be effective drugs for the treatment of tics in Gilles de la Tourette syndrome (GTS). Evidence concerning the efficacy of olanzapine and other atypical antipsychotics in the treatment of tics in GTS is growing, but still limited. Little is known about the use of olanzapine in adult GTS patients and about its effect on comorbid behavioural problems. We report on the use of olanzapine in a 25-year old male GTS patient with comorbid obsessive-compulsive behaviours, who was treated with olanzapine. Tic severity was rated using the Yale Global Tic Severity Scale (Y-GTSS). Comorbid obsessive-compulsive symptoms were assessed with the Yale-Brown Obsessive Compulsive Scale (Y-BOCS). Both scales were performed at admission and after 4 weeks of treatment with olanzapine. Treatment with olanzapine (20 mg) resulted not only in a fast reduction of tic severity and frequency, but also in a reduction of obsessive-compulsive behaviours.ConclusionsThis case report further supports the available literature on the use of olanzapine as a therapeutic strategy for tics in GTS and draws attention to its possible use for comorbid behavioural disorders. Further research of antipsychotics in GTS should include measurements of comorbid behavioural symptom clusters.

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