Efficacy and safety comparison between the DPP-4 inhibitor vildagliptin and the sulfonylurea gliclazide after two years of monotherapy in drug-naïve patients with type 2 diabetes

J E Foley, S Sreenan
Hormone and Metabolic Research 2009, 41 (12): 905-9
This report is part of the overall evaluation of using vildagliptin in the treatment of type 2 diabetes. Here the results of a multi-center, double-blind, randomized, active-controlled study designed to compare the efficacy and safety of two years of monotherapy with vildagliptin 50 mg bid and gliclazide up to 320 mg/day in drug-naïve patients with type 2 diabetes are reported. A total of 546 patients were randomized and approximately 74% of patients completed the study in each group. HbA (1c) values were slightly higher in the gliclazide group (HbA (1c) of 8.7+/-0.1% vs. 8.5+/-0.1% in the vildagliptin group). The mean reduction in HbA (1c) from baseline to Week 104 was -0.5% in the vildagliptin group and -0.6% in the gliclazide group. The associated 95% confidence interval (CI) for the between-group difference (0.13%) in mean change was (-0.06%, 0.33%). Thus, noninferiority based on an upper limit of the CI of 0.3% was not met. In the vildagliptin group, weight increased by 0.8+/-0.2 kg compared to 1.6+/-0.2 kg in the gliclazide group (p<0.01). Mild hypoglycemia was recorded in 0.7% of patients in the vildagliptin group and in 1.7% in the gliclazide group. Both drugs were well tolerated. In summary, vildagliptin monotherapy resulted in improved glycemic control in drug-naïve patients with type 2 diabetes. Although the hypothesis of noninferiority to gliclazide was not borne out statistically, the reductions in HbA (1c) were similar over a two year period and vildagliptin had significant benefits in terms of less weight gain and less hypoglycemia.

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