[Agranulocytosis induced by dapsone prescribed for dermatitis herpetiformis].
L. Machet, A. Callens, E. Mercier, S Gargot, G Lorette, L. Vaillant
Abstract
L. Machet, A. Callens, E. Mercier, S Gargot, G Lorette, L. Vaillant
Abstract
INTRODUCTION: Dapsone is a drug widely prescribed in dermatology. It can lead to undesirable side effects including hematologic disorders. CASE REPORT: A patient with dermatitis herpetiformis was treated with dapsone. Agranulocytosis developed 6 weeks later and was revealed by fever and pneumonia which resolved under antibiotics. The agranulocytosis regressed without specific treatment after drug withdrawal. Blood counts returned to normal 2 weeks later. DISCUSSION: Dapsone-induced agranulocytosis is in common (1/10,000 to 1/20,000). The drug is widely prescribed, particularly for leprosy. Nevertheless, when dapsone is prescribed for dermatitis herpetiformis, the risk of agranulocytosis increases 25-fold reaching 1/400. The indication for dapsone must always made carefully, with surveillance of the blood counts every 15 days during the first 3 months of treatment for dermatitis herpetiformis.
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INTRODUCTION: Dapsone is a drug widely prescribed in dermatology. It can lead to undesirable side effects including hematologic disorders. CASE REPORT: A patient with dermatitis herpetiformis was treated with dapsone. Agranulocytosis developed 6 weeks later and was revealed by fever and pneumonia which resolved under antibiotics. The agranulocytosis regressed without specific treatment after drug withdrawal. Blood counts returned to normal 2 weeks later. DISCUSSION: Dapsone-induced agranulocytosis is in common (1/10,000 to 1/20,000). The drug is widely prescribed, particularly for leprosy. Nevertheless, when dapsone is prescribed for dermatitis herpetiformis, the risk of agranulocytosis increases 25-fold reaching 1/400. The indication for dapsone must always made carefully, with surveillance of the blood counts every 15 days during the first 3 months of treatment for dermatitis herpetiformis.
Key concepts: Dermatitis herpetiformis, Dapsone, Medicine, Dermatology, Drug, Exfoliative dermatitis, Antibiotics, Pharmacology