7, 5% i begge grupper).
In a 52-week study, comparing the efficacy and safety of the addition of sitagliptin 100 mg once daily or glipizide (a sulphonylurea agent) in patients with inadequate glycaemic control on metformin monotherapy, sitagliptin was similar to glipizide in reducing HbA1c (-0.7% mean change from baselines at week 52, with baseline HbA1c of approximately 7.5% in both groups).