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Related Experiment Videos

Warfarin-induced leukocytoclastic vasculitis.

Bahareh Yaghoubian1, Binh Ngo, May Mak

  • 1Ambulatory Care Pharmacy, University of Southern California School of Pharmacy, Los Angeles, CA 90033, USA.

Cutis
|July 29, 2005
PubMed
Summary

Late-onset leukocytoclastic vasculitis (LV) is a rare skin reaction possibly linked to warfarin, an anticoagulant. Discontinuing warfarin resolved symptoms, and rechallenging caused recurrence in some patients.

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Area of Science:

  • Dermatology
  • Pharmacology
  • Internal Medicine

Background:

  • Oral coumarin-derived anticoagulants, like warfarin, are commonly prescribed for thromboembolic disorders.
  • Skin reactions to these anticoagulants are infrequent, but can be severe.
  • Leukocytoclastic vasculitis (LV) is a small vessel vasculitis predominantly affecting the skin.

Observation:

  • This report details four patients who developed late-onset skin eruptions after several years of warfarin therapy.
  • Skin biopsies in three patients confirmed leukocytoclastic vasculitis.
  • All patients experienced resolution of cutaneous lesions upon warfarin discontinuation.

Findings:

  • Warfarin-induced leukocytoclastic vasculitis can manifest as a late-onset adverse reaction.

Related Experiment Videos

  • Rechallenge with warfarin in two patients resulted in the recurrence of skin lesions, supporting a causal link.
  • The study highlights the potential for delayed hypersensitivity reactions to warfarin.

    • Implications:

    • Clinicians should consider warfarin as a potential cause of late-onset leukocytoclastic vasculitis in patients presenting with compatible skin lesions.
    • Early recognition and discontinuation of warfarin may prevent disease progression and recurrence.
    • Further research is warranted to elucidate the mechanisms of warfarin-induced vasculitis.