Tics and vocalizations in children treated with carbamazepine

Area of Science:

• Neurology
• Pharmacology

Background:

• Carbamazepine is a widely used antiepileptic drug for seizure management.
• Tourette's syndrome is a neurological disorder characterized by repetitive, involuntary movements and vocalizations (tics).

Observation:

• Three patients developed Tourette's syndrome or experienced exacerbated tics and vocalizations after starting carbamazepine.
• Carbamazepine blood levels were therapeutic, and no signs of intoxication were observed.
• Tics and vocalizations persisted even after carbamazepine discontinuation.

Findings:

• Carbamazepine initiation was associated with the onset or worsening of Tourette's syndrome symptoms in the reported cases.
• The drug's effect on tics appears independent of intoxication levels.
• Persistent symptoms post-discontinuation suggest a potential long-term or triggering effect.

Implications:

• Carbamazepine may act as a trigger for Tourette's syndrome in genetically or otherwise susceptible individuals.
• Clinicians should consider this potential adverse effect when prescribing carbamazepine, especially in patients with a history of tics.
• Further research is warranted to elucidate the mechanism by which carbamazepine might influence tic disorders.