Glyburide in non-insulin-dependent diabetes. Its therapeutic effect in patients with disease poorly controlled by insulin alone

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Abstract
Glyburide, a 2nd-generation sulfonylurea compound, was combined with insulin to evaluate its therapeutic effectiveness in 14 patients with non-insulin-dependent diabetes mellitus (NIDDM), poorly controlled by insulin alone. Patients were studied before and 3 mo. after the addition of glyburide to their insulin program. Fasting plasma glucose concentration fell an average of 57 mg/dl, associated with an .apprx. 25% reduction in postprandial glucose response. Therapeutic responses varied widely from patient to patient; the greatest improvement in diabetic control was seen in heavier patients, who had retained the ability to secrete insulin in response to meals and who were not excessively insulin resistant. The glyburide-induced fall in plasma glucose concentration was associated with improvements in both insulin secretion and insulin action, but only the enhanced insulin action correlated with the reduction in fasting and postprandial glucose levels. Diabetic control was significantly improved by glyburide. Combined insulin-sulfonylurea therapy may be useful in the treatment of NIDDM that cannot be easily controlled with either agent alone.