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Retroperitoneal haematoma after paracetamol increased anticoagulation
  1. F J Andrews
  1. Accident and Emergency Department, St James's University Hospital, Leeds, UK
  1. Correspondence to:
 Dr F Andrews, Lecturer in Intensive Care Medicine, Whiston Hospital, Prescot L35 5DR, UK;


Drugs containing paracetamol are widely used as analgesics but may result in increased anticoagulation in patients who take warfarin, the mechanism being unclear. Retroperitoneal haemorrhage is a serious and well described complication in patients who develop increased anticoagulation; this may result in a femoral neuropathy. Both conservative and surgical treatments have been advocated for this complication.

  • warfarin
  • paracetamol
  • retroperitoneal haematoma
  • femoral neuropathy
  • INR
  • international normalised ratio

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  • Conflicts of interest: none.

  • Funding: none.