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22nd February 2024

A 77 year old male was admitted to hospital after a fall.

A 77 year old male was admitted to hospital after a fall. He reported that he had been experiencing frequent palpitations and felt that his heart was ‘racing’ even if he was sitting down. An ECG revealed atrial fibrillation and the patient was commenced on warfarin.

Which one of the following pieces of information is most important to inform this patient regarding Warfarin?

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