Indication: Indicated as an adjunct to diet and exercise to improve glycemic control in patients with type 2 diabetes mellitus: who are already treated with the combination of sitagliptin and metformin; or who have inadequate glycemic control on sitagliptin or metformin alone; or who have inadequate glycemic control on the combination of metformin and a sulfonylurea; or who have inadequate glycemic control on the combination of metformin and a PPARγ agonist; or who have inadequate glycemic control on the combination of metformin and insulin.