A Phase III, Randomized, Double-blind, Placebo-controlled, Parallel Group Safety and Efficacy Study of BI 10773 (10 mg and 25 mg Administered Orally Once Daily) During 52 Weeks in Patients With Type 2 Diabetes Mellitus and Insufficient Glycemic Control on MDI Insulin Regimen Alone or With Metformin

This trial will evaluate use of BI 10773 as add-on to insulin regimen alone or with metformin in patients with typr 2 diabetes. Both lowering glucose and HbA1c and reducing the use of insulin in this population would provide significant new information for the BI 10773 use and would offer a potential new therapeutic option in this population.