Factitious Hypoglycemia Due to Surreptitious Administration of Insulin

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Abstract
Ten patients had factitious hypoglycemia due to surreptitious insulin injections diagnosed and were followed for up to 15 years (median, 5 years; range, 2 months to 15 years). When available, demonstration of anti-insulin antibodies were the most helpful diagnostic test. Decreased plasma C-peptide levels corroborated the diagnosis. Young women (nine of ten) with knowledge of the medical profession or relatives with diabetes mellitus predominated in the sample. Five of the patients had a history of insulin-requiring diabetes mellitus. Two patients eventually committed suicide despite the best efforts at therapy. Only three of ten patients made a successful transition into productive life after the diagnosis of factitious hypoglycemia was established. Factitious hypoglycemia remains a difficult diagnosis to make, and the long-term outcome after the diagnosis is established is unpredictable. All efforts have to be made to confirm the diagnosis before the patients are approached. The confrontation is to be made by an experienced team of health care professionals who have gained the patient''s confidence through an understanding but firm manner. Long-term therapy must be planned and initiated before the patient''s discharge.

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