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Unusual side effects due to warfarin

M J Krahn1, N M Pettigrew, T E Cuddy

  • 1Health Sciences Centre, University of Manitoba, Winnipeg.

The Canadian Journal of Cardiology
|March 6, 1998
PubMed
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Rare but serious side effects of warfarin, including purple toes syndrome and vasculitis, are presented in two patient cases. These adverse events highlight the need for careful monitoring of this widely used anticoagulant medication.

Area of Science:

  • Cardiology
  • Pharmacology
  • Clinical Medicine

Background:

  • Warfarin is a widely prescribed anticoagulant medication.
  • It is commonly used for conditions such as atrial fibrillation and stroke.
  • Mechanical valve prostheses require anticoagulation therapy.

Observation:

  • Two distinct cases of unusual warfarin side effects were observed.
  • Case 1: Purple toes syndrome developed in a patient treated for atrial fibrillation and stroke.
  • Case 2: Warfarin-induced vasculitis occurred in a patient with a mechanical valve prosthesis.

Findings:

  • Purple toes syndrome is a rare complication of warfarin therapy.
  • Warfarin can induce vasculitis, particularly in patients with mechanical heart valves.

Related Experiment Videos

  • Nicoumalone, a related drug, was successfully used to manage warfarin intolerance.

    • Implications:

    • These cases underscore the potential for rare but severe adverse effects from warfarin.
    • Physicians should be aware of these uncommon complications.
    • Alternative anticoagulants may be necessary for patients intolerant to warfarin.