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Tourette syndrome (TS) is a chronic neuropsychiatric disorder characterized by recurrent multiple motor and vocal tics that last for at least one year and follow a waxing and waning course. A fundamental step in the pathophysiology of TS is the hyperactivity of dopaminergic system leading to increased dopamine release in the cortical-basal ganglia-thalamo-cortical (CBGTC) circuits, thereby providing the rationale for treatment with dopamine receptor, in particular D2, antagonists. Although antipsychotics have shown considerable efficacy against tics in most patients, there have been cases of paradoxical onset of tics in individuals without history, and relapse or exacerbation of tics in individuals with a history of tic disorders upon initiation of antipsychotics. Here we report a case of an individual with intellectual disability, attention deficit hyperactivity disorder (ADHD), and schizophrenia, who experienced a relapse of TS symptoms after initiation of chlorpromazine therapy.

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Chlorpromazine-Induced Relapse of Tourette Syndrome in a Patient With Intellectual Disability, Attention Deficit Hyperactivity Disorder, and Schizophrenia