Efficacy of conversion from bedtime NPH insulin to morning insulin glargine in type 2 diabetic patients on basal-prandial insulin therapy
Abstract
In normal subjects, approximately half of the daily insulin requirement constitutes basal insulin. We investigated whether increasing the dose of insulin glargine up to half of the total insulin requirement could lead to better glycemic control in type 2 diabetic patients who were treated on basal-prandial insulin therapy. A total of 62 patients with type 2 diabetes on mealtime rapid-acting insulin analogue and bedtime NPH were randomized to either continuation of bedtime NPH (n=31) or morning glargine (n=31) for 6 months while continuing the aspart/lispro at each meal. The two groups were matched for age, sex, diabetes duration, BMI, HbA(1C), endogenous insulin secretion, and proportion of numbers using aspart/lispro and using oral hypoglycemic agents. The dose of insulin glargine was increased by 2-4 units to meet the target fasting blood glucose, whereas the dose of NPH was principally unchanged as a control group. Mean HbA(1C) at baseline was similar between patients with glargine and NPH (7.2% versus 6.9%). The percentage of glargine dose increased significantly (31% at baseline to 48% at 6 months) without any significant changes in total insulin dose. Mean HbA(1C) at 3 months was 6.6% with glargine and 7.0% with NPH (P<0....Continue Reading
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