JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

A randomized controlled trial of the efficacy and safety of saxagliptin as add-on therapy in patients with type 2 diabetes and inadequate glycaemic control on metformin plus a sulphonylurea

R G Moses, S Kalra, D Brook, J Sockler, J Monyak, J Visvanathan, M Montanaro, S A Fisher
Diabetes, Obesity & Metabolism 2014, 16 (5): 443-50
24205943

AIMS: To evaluate the efficacy and safety of saxagliptin as add-on therapy in adults with type 2 diabetes with inadequate glycaemic control on metformin plus a sulphonylurea.

METHODS: In this 24-week, multicentre, randomized, parallel-group, double-blind study, outpatients aged ≥18 years with type 2 diabetes, body mass index ≤40 kg/m(2) and inadequate glycaemic control, received saxagliptin 5 mg or placebo once-daily added to background medication consisting of a stable maximum tolerated dose of metformin plus a sulphonylurea. The primary end point was change in glycated haemoglobin (HbA1c) from baseline to week 24. Safety and tolerability assessments included adverse events (AEs), hypoglycaemia and body weight.

RESULTS: A total of 257 patients were randomized, treated and included in the safety analysis (saxagliptin, n = 129; placebo, n = 128); 255 were included in the efficacy analysis (saxagliptin, n = 127; placebo, n = 128). HbA1c reduction was greater with saxagliptin versus placebo [between-group difference in adjusted mean change from baseline, -0.66%; 95% confidence interval (CI), -0.86 to -0.47 (7 mmol/mol, -9.4 to -5.1); p < 0.0001]. The proportion of patients with ≥1 AE was 62.8% with saxagliptin and 71.7% with placebo. In the saxagliptin and placebo groups, rates of reported hypoglycaemia were 10.1 and 6.3%, respectively, and rates of confirmed hypoglycaemia (symptoms + glucose < 2.8 mmol/l) were 1.6 and 0%. Mean change in body weight was 0.2 kg for saxagliptin and -0.6 kg for placebo (p = 0.0272).

CONCLUSION: Addition of saxagliptin 5 mg/day in patients inadequately controlled on metformin and sulphonylurea effectively improved glycaemic control and was well tolerated.

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