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Reminder of important clinical lesson
An unexpected case of coumarin poisoning with coumatetralyl
  1. Amin Kay1,
  2. Leo Chiu2,
  3. Christopher AKY Chong2
  1. 1Department of Medicine, Queen’s University, Kingston, Canada
  2. 2General Internal Medicine, Lakeridge Health Oshawa, Oshawa, Canada
  1. Correspondence to Christopher AKY Chong, caky.chong{at}gmail.com

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.

https://doi.org/10.1136/bcr.05.2010.2992

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    Footnotes

    • Competing interests None.

    • Patient consent Obtained.