The dipeptidyl peptidase-4 inhibitor vildagliptin (Galvus®) is approved for use as monotherapy and combination therapy in type 2 diabetes mellitus. A fixed-dose combination of vildagliptin/metformin (Eucreas®) is also available. This article reviews the clinical efficacy and tolerability of vildagliptin in the treatment of type 2 diabetes, as well as summarizing its pharmacological properties. Results of randomized controlled trials demonstrated that oral vildagliptin improved glycaemic control when administered as monotherapy, as dual therapy in combination with metformin, a sulfonylurea or a thiazolidinedione, as triple therapy in combination with metformin plus a sulfonylurea, and in combination with insulin with or without metformin. Improvements in glycaemic control were also seen with vildagliptin in elderly patients with type 2 diabetes and in patients with type 2 diabetes and moderate or severe renal impairment. Vildagliptin was generally well tolerated in patients with type 2 diabetes, was weight neutral and was associated with a low risk of hypoglycaemia, reflecting its glucose-dependent mechanism of action. Thus, oral vildagliptin is a useful option as monotherapy or as add-on therapy for patients with type 2 diabetes.