Journal
DIABETES CARE
Volume 29, Issue 6, Pages 1282-1287Publisher
AMER DIABETES ASSOC
DOI: 10.2337/dc05-1879
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OBJECTIVE - To compare the efficacy and safety profile of adding inhaled human insulin (INH; Exubera) or metformin to sulfonylurea monotherapy in patients with poorly controlled type 2 diabetes. RESEARCH DESIGN AND METHODS We performed an open-label, parallel, 24-week, multicenter trial. At week -1, patients uncontrolled on sulfortylurea monotherapy were divided into two HbA(1C) (AIC) arms: >= 8 to <= 9.5% (moderately high) and > 9.5 to <= 12% (very high). Patients were randomized to adjunctive premeal INH (n = 225) or metformin (n = 202). The primary efficacy end point was change in AIC from baseline. RESULTS - In the A1C > 9.5% arm, INH demonstrated a significantly greater reduction in AIC than metformin. Mean adjusted changes from baseline were -2.17 and - 1.79%, respectively; between-treatment difference was -0.38% (95% Cl -0.63 to -0.14, P = 0.002). In the A1C <= 9.5% arm, mean adjusted AIC changes were -1.94 and -1.87%, respectively (-0.07% [-0.33 to 0.19],P = 0.610), consistent with the noninferiority criterion. Hypoglycemia (events/ subject-month) was greater in the INH (0.33) than in the metformin (0.15) group (risk ratio 2.16 [95016 Cl 1.67-2.78]), but there were no associated discontinuations. Other adverse events, except increased cough in the INH group, were similar. At week 24, changes in pulmonary function parameters were small and comparable between groups. Insulin antibody binding increased more with INH but did not have any associated clinical manifestations CONCLUSIONS - in patients with type 2 diabetes poorly controlled on a sulfonylurea (AIC > 9.5%), the addition of premeal INH significantly improves glycemic control compared with adjunctive metformin and is well tolerated.
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