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• tardive dyskinesia (late onset of choreoathetoid movements, abnormal, involuntary, may occur in 40% of patients, may be irreversible, most common is chewing and pouting of jaw) The Medicines and Healthcare products Regulatory Agency has issued specific warnings when antipsychotics are used in elderly patients: • increased risk of stroke • increased risk of venous thromboembolism Other side-effects • antimuscarinic: dry mouth, blurred vision, urinary retention, constipation • sedation, weight gain • raised prolacti