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Related Experiment Videos

Adverse interaction between warfarin and indomethacin

T Y Chan1, S F Lui, S Y Chung

  • 1Department of Clinical Pharmacology, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T.

Drug Safety
|March 1, 1994
PubMed
Summary
This summary is machine-generated.

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Combined warfarin and indomethacin therapy increased bleeding risk in a patient. Close monitoring of prothrombin time is crucial for patients on both drugs due to potential interactions.

Area of Science:

  • Pharmacology
  • Clinical Medicine
  • Internal Medicine

Background:

  • Warfarin is a common anticoagulant medication.
  • Indomethacin is a nonsteroidal anti-inflammatory drug (NSAID).
  • Combined drug therapies require careful consideration of potential interactions.

Observation:

  • A 57-year-old male patient experienced spontaneous skin bruising.
  • The patient also presented with haematuria (blood in urine).
  • These symptoms occurred during concurrent warfarin and indomethacin treatment.

Findings:

  • Nonsteroidal anti-inflammatory drugs (NSAIDs) can affect warfarin's anticoagulant efficacy.
  • NSAIDs can also impact platelet function, increasing bleeding risk.
  • The combination therapy led to adverse bleeding events in this patient.

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Implications:

  • Patients on combined warfarin and NSAID therapy require vigilant prothrombin time monitoring.
  • Healthcare providers must remain aware of the heightened risk of gastrointestinal haemorrhage with NSAID use.
  • This case underscores the importance of individualized patient monitoring in polypharmacy.