Effects of Combined Insulin-Sulfonylurea Therapy in type II Patients

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Abstract
We conducted a double-blind crossover study to determine which patient characteristics best predict a beneficial response to combined insulin-glyburide therapy. Glyburide (15 mg/day) or placebo was added to the treatment regimen of 31 insulin-treated type II (non-insulin-dependent) diabetic subjects. During glyburide therapy, there was a significant improvement in glycemic control with a reduction in glycosylated hemoglobin from 9.9 ± 1.3 to 9.1 ± 1.3% (P < .001). Patients who responded had higher fasting C-peptide levels (P < .001) and shorter durations of insulin therapy (P < .01) than those who did not respond. Glyburide withdrawal was associated with a > expected deterioration in glycemic control. Patients on insulin therapy for > 8 yr are unlikely to benefit significantly from the addition of glyburide to their treatment regimen.

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