Letter to the Editor
Sir: Tardive dyskinesia is an abnormal involuntary movement disorder characterized most commonly by choreoathetoid movements of orofacial muscles and distal limbs. Tardive dyskinesia occurs in predisposed individuals during or after cessation of long-term antipsychotic exposure. The risk of developing tardive dyskinesia increases by an average of approximately 5% per year of antipsychotic exposure to 68% by 25 years.
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