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Pathophysiologic mechanisms, diagnosis, and management of dapsone-induced methemoglobinemia
John V Ashurst1, Megan N Wasson, William Hauger
1Lake Erie College of Osteopathic Medicine, Pennsylvania, USA. john.ashurst@lecom.edu
Abstract:
Dapsone is a leprostatic agent commonly prescribed for the treatment of patients with leprosy, malaria, and a variety of blistering skin diseases, including dermatitis herpetiformis. Methemoglobinemia, a potentially life-threatening condition in which the oxygen-carrying capacity of blood in body tissues is reduced, is a known adverse effect of dapsone use. The authors report a case of dapsone-induced methemoglobinemia observed in the emergency department during routine workup for contact dermatitis in a patient with celiac disease. The pathophysiologic mechanisms, diagnosis, and management of dapsone-induced methemoglobinemia are discussed.
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