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Unexpected outcome (positive or negative) including adverse drug reactions
Clinically significant interaction between warfarin and popular cough lozenges ‘Fisherman’s Friend’
  1. Stephen Boyle1,
  2. Matthew R Walters2
  1. 1Orthopaedics Department, Southern General Hospital, Glasgow, UK
  2. 2Acute Stroke Unit, Western Infirmary, Glasgow, UK
  1. Correspondence to Professor Matthew R Walters, matthew.walters{at}glasgow.ac.uk

Summary

The authors report a highly probable and clinically relevant interaction between warfarin and the popular cough lozenges ‘Fisherman’s Friends’ in a 67-year-old man, whereby ingestion of these lozenges for approximately 1 month was associated with a significant reduction in international normalised ratio to subtherapeutic levels.

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Footnotes

  • Competing interests None.

  • Patient consent Obtained.

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