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Antipsychotic QT risk — GPhC CRA MCQ

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ModerateCNS TherapeuticsAntipsychotic QT riskGPhC CRA

A 67-year-old patient taking citalopram 20 mg daily is prescribed haloperidol for severe agitation. Her GP asks what safety issue should be considered before continuing treatment. What monitoring is required?

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Correct answer: A — Assess QT-prolongation risk and consider ECG and electrolyte review

Haloperidol and citalopram can both prolong the QT interval. Older age and electrolyte disturbance can further increase arrhythmia risk. ECG and electrolyte assessment may be appropriate, particularly if ongoing treatment is planned or risk factors are present. The other monitoring suggestions do not address the key safety concern.

Reference: BNF; NICE CKS