JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

A comparison of efficacy and safety of vildagliptin and gliclazide in combination with metformin in patients with Type 2 diabetes inadequately controlled with metformin alone: a 52-week, randomized study

C Filozof, J-F Gautier
Diabetic Medicine: a Journal of the British Diabetic Association 2010, 27 (3): 318-26
20536495

AIM: To demonstrate non-inferiority of vildagliptin compared with gliclazide, as an add-on therapy, in patients with Type 2 diabetes inadequately controlled with metformin in a 52-week, randomized, double-blind, active-controlled study.

METHODS: Patients receiving a stable dose of metformin (> or = 1500 mg) were randomized (1 : 1) to receive vildagliptin (50 mg twice daily; n = 513) or gliclazide (up to 320 mg/day; n = 494).

RESULTS: Non-inferiority of vildagliptin was demonstrated (95% confidence interval -0.11%, 0.20%) with a mean change (se) from baseline glycated haemoglobin (HbA(1c)) (approximately 8.5% in both groups) to a 52-week endpoint of -0.81% (0.06) with vildagliptin and -0.85% (0.06) with gliclazide. Although a similar proportion of patients reached HbA(1c) < 7.0%, the total number of hypoglycaemic events was lower in the vildagliptin group (6 vs. 11 events). Vildagliptin was non-inferior (margin 0.6 mmol/l) to gliclazide in reducing fasting plasma glucose (1.31 vs. 1.52 mmol/l, P = 0.257). The overall incidence of any adverse events was similar in both groups (approximately 61%), but the number of serious adverse events was higher in the gliclazide group (8.7 vs. 6.7%). The number of patients who discontinued as a result of an unsatisfactory effect was higher in the vildagliptin group (n = 22 vs. 13, respectively) compared with gliclazide, but vildagliptin did not induce weight gain.

CONCLUSION: In patients with Type 2 diabetes inadequately controlled with metformin, addition of vildagliptin provided similar HbA(1c)-lowering efficacy compared with gliclazide after 52 weeks of treatment. Although both treatments were well tolerated, vildagliptin-treated patients had fewer hypoglycaemic events and did not gain weight.

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