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  • Title: Pentamidine-induced derangements of glucose homeostasis. Determinant roles of renal failure and drug accumulation. A study of 128 patients.
    Author: Assan R, Perronne C, Assan D, Chotard L, Mayaud C, Matheron S, Zucman D.
    Journal: Diabetes Care; 1995 Jan; 18(1):47-55. PubMed ID: 7698047.
    Abstract:
    OBJECTIVE: To assess the prevalence, presentation, and risk factors of pentamidine-induced dysglycemia. RESEARCH DESIGN AND METHODS: Blood glucose values were screened in 244 consecutive immunocompromised patients with Pneumocystis carinii pneumonia: 116 being treated with cotrimoxazole and 128 others with pentamidine. RESULTS: Two cotrimoxazole patients developed diabetes as a result of necrotizing pancreatitis (1.7%); the others remained euglycemic. Forty-eight pentamidine-treated patients (38.5%) developed severe glucose homeostasis disorders: hypoglycemia in 7, hypoglycemia and then diabetes in 18, and diabetes alone in 23 (P < 0.001 vs. the cotrimoxazole group). Hypoglycemia was early, sudden, often recurrent, and life-threatening, associated with inappropriately high insulin levels in plasma; the B-cell response to stimuli was poor. Of the 41 diabetic patients, 26 required insulin therapy; their plasma C-peptide levels were lower than normal, and the B-cell secretory responses to stimuli were poor. Islet cell antibodies, insulin antibodies, and insulitis were not detected. The pentamidine-treated dysglycemic patients differed from their euglycemic counterparts by higher pentamidine doses (P < 0.001), higher plasma creatinine levels (P < 0.001), and more severe anoxia (P < 0.05) and shock (P < 0.001). Most of them had received pentamidine mesylate parenterally (n = 36; 75%); six others received the isethionate salt and six exclusively pentamidine aerosols. CONCLUSIONS: Pentamidine-induced dysglycemic accidents are primarily due to inappropriate insulin release and toxicity to the islet B-cells. Drug accumulation due to excessive doses, iterative courses, and/or renal impairment is the determining risk factor.
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