Alogliptin versus glipizide monotherapy in elderly type 2 diabetes mellitus patients with mild hyperglycaemia: a prospective, double-blind, randomized, 1-year study

J Rosenstock, C Wilson, P Fleck
Diabetes, Obesity & Metabolism 2013, 15 (10): 906-14

AIM: To prospectively evaluate the efficacy and safety of alogliptin versus glipizide in elderly patients with type 2 diabetes mellitus (T2DM) over 1 year of treatment.

METHODS: This was a randomized, double-blind, active-controlled study of elderly T2DM patients (aged 65-90 years) with mild hyperglycaemia on diet/exercise therapy alone [glycosylated haemoglobin (HbA1c) 6.5-9.0%] or plus oral antidiabetic monotherapy (HbA1c 6.5-8.0%). Patients were randomized to once-daily alogliptin 25 mg or glipizide 5 mg titrated to 10 mg, if needed. Hypoglycaemic episodes were systematically captured under predefined criteria.

RESULTS: In the primary analysis, HbA1c mean changes from a baseline of 7.5% were -0.14% with alogliptin (n = 222) and -0.09% with glipizide (n = 219) at the end of the study, demonstrating non-inferiority of alogliptin to glipizide [least squares (LS) mean difference = -0.05%; one-sided 97.5% confidence interval (CI): -∞, 0.13%]. More clinically relevant HbA1c reductions occurred among patients who completed the study: -0.42 and -0.33% with alogliptin and glipizide, with non-inferiority again confirmed (LS mean difference = -0.09%; one-sided 97.5% CI: -∞, 0.07%). Overall, alogliptin was safe and well tolerated, with notably fewer hypoglycaemic episodes than glipizide [5.4% (31 episodes) vs. 26.0% (232 episodes), respectively]; three patients experienced severe hypoglycaemia, all with glipizide. Alogliptin also resulted in favourable weight changes versus glipizide (-0.62 vs. 0.60 kg at week 52; p < 0.001).

CONCLUSIONS: Alogliptin monotherapy maintained glycaemic control comparable to that of glipizide in elderly patients with T2DM over 1 year of treatment, with substantially lower risk of hypoglycaemia and without weight gain.


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