Glucophage (metformin) is the standard first line therapy for subjects with type 2 diabetes mellitus (DM). The consensus statement from the American Diabetes Association and the European Association for the Study of Diabetes has recommended metformin therapy in concurrent with lifestyle intervention at diagnosis. It has been well accepted that subjects' compliance with therapy tends to decrease as the dosage frequency increases and hence the regimens should be simplified as far as possible to support good compliance with therapy. The use of an extended release formulation of metformin (Glucophage XR) supports the simplification of treatment of subjects with type 2 diabetes by allowing a once daily administration of metformin.