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[Dapsone-induced decrease in the HbA(1c) level may cause artefacts in diabetic control]
Siv Elisabeth Lajlev1, Søren Andreas Ladefoged, Kjeld Hermansen
1Medicinsk Endokrinologisk Afdeling, Aarhus Universitetshospital, Denmark. siv@lajlev.dk
Insights
Dapsone treatment in a diabetic patient caused a misleading drop in glycated haemoglobin (HbA1c) levels. This occurred due to mild haemolysis, affecting red blood cell lifespan and impacting diabetes monitoring.
Area of Science:
- Endocrinology
- Hematology
- Dermatology
Background:
- Glycated haemoglobin (HbA1c) is crucial for monitoring diabetes mellitus (DM) and diagnosing type 2 DM.
- Dapsone is a medication used to treat dermatitis herpetiformis, a condition linked to coeliac disease.
Abstract:
Glycated haemoglobin (HbA(1c)) level is used to monitor glycaemic control in diabetic patients, and has recently been included as a diagnostic factor for type 2 diabetes mellitus (DM). A 50-year-old male with well-controlled type 1 DM, Mb Addison and coeliac disease was diagnosed with dermatitis herpetiformis and treated with dapsone. Subsequently, the patient presented a pronounced drop in HbA(1c) levels without changes in blood glucose levels. S-fructosamine values were in agreement with the previous stable HbA(1c) values. Blood analyses showed inappropriately low HbA(1c) values due to mild haemolysis and shortening of erythrocyte lifetime without anaemia.
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