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Potential interaction between warfarin and boldo-fenugreek.

J P Lambert1, J Cormier

  • 1Pharmacy Department, CHAUQ, St-Sacrement Hospital, Québec City, Canada.

Pharmacotherapy
|April 20, 2001
PubMed
Summary
This summary is machine-generated.

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Boldo and fenugreek may increase bleeding risk in patients taking warfarin. Discontinuing these herbs normalized international normalized ratio (INR) levels, suggesting a significant herb-drug interaction.

Area of Science:

  • Pharmacology
  • Natural Products Research
  • Clinical Medicine

Background:

  • Warfarin is a common anticoagulant medication used to prevent blood clots in conditions like atrial fibrillation.
  • Patients often use herbal products alongside conventional medications, leading to potential interactions.
  • Understanding herb-drug interactions is crucial for patient safety and effective treatment.

Observation:

  • A patient on warfarin therapy experienced elevated international normalized ratio (INR) levels.
  • The patient reported concurrent use of boldo and fenugreek herbal supplements.
  • INR levels normalized upon discontinuation of boldo and fenugreek, and the interaction recurred upon reintroduction.

Findings:

  • The Naranjo algorithm indicated a probable association between boldo-fenugreek use and increased warfarin effect (elevated INR).

Related Experiment Videos

  • This suggests a significant herb-drug interaction potentiating the anticoagulant activity of warfarin.
  • No adverse events were reported by the patient during the observation period.

    • Implications:

    • Clinicians should exercise vigilance regarding potential interactions between warfarin and herbal agents like boldo and fenugreek.
    • Patients on anticoagulant therapy should disclose all herbal product use to their healthcare providers.
    • Further research into the specific mechanisms of boldo-fenugreek interaction with warfarin is warranted.