RT Book, Section A1 Sago, Joni G. A1 Hall, Russell P. A2 Goldsmith, Lowell A. A2 Katz, Stephen I. A2 Gilchrest, Barbara A. A2 Paller, Amy S. A2 Leffell, David J. A2 Wolff, Klaus SR Print(0) ID 56098794 T1 Chapter 225. Dapsone T2 Fitzpatrick's Dermatology in General Medicine, 8e YR 2012 FD 2012 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-166904-7 LK accessmedicine.mhmedical.com/content.aspx?aid=56098794 RD 2024/04/24 AB |PrintDapsone at a GlanceDapsone (4,4’-diaminodiphenylsulfone) is classified as sulfonamide but has unique pharmacologic properties.Diseases with consistent response to dapsone are dermatitis herpetiformis, erythema elevatum diutinum, linear immunoglobulin A dermatosis/chronic bullous disease of childhood and bullous eruption of systemic lupus erythematosus.Diseases with sporadic response to dapsone encompass a wide spectrum and are as diverse as collagen vascular/autoimmune diseases and acne. In these diseases, dapsone can be used as a corticosteroid sparing agent.A unifying feature of responsive diseases is neutrophilic and eosinophilic granulocytes.Dapsone is also effective in certain infections such as leprosy, actinomycetoma, or rhinosporidiosis.Adverse effects are hemolysis and methemoglobulinemia. Glucose-6-phosphate dehydrogenase (G6PD) level should be obtained before beginning dapsone treatment. Dapsone should only be given with great caution to patients with G6PD deficiency.Other adverse effects are neuropathy, a mononucleosis-like hypersensitivity syndrome termed the sulfone syndrome, and agranulocytosis.