Article Text
Reminder of important clinical lesson
An unexpected case of coumarin poisoning with coumatetralyl
Summary
A healthy man in his 40s presented with a 1-month history of haemoptysis and was unexpectedly found to have an elevated international normalised ratio (INR). He denied any known exposures to anticoagulants. Testing for the possible aetiologies of a high INR revealed coumarin poisoning with coumatetralyl as the cause. The approach to an elevated INR and management and diagnosis of suspected coumarin poisoning is reviewed.
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Footnotes
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Competing interests None.
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Patient consent Obtained.