Overview MK0431A Comparative Study in Patients With Type 2 Diabetes (0431A-079)(COMPLETED) Status: Completed Trial end date: 2009-04-27 Target enrollment: Participant gender: Summary The purpose of this study is to investigate the efficacy and safety of an investigational treatment for type 2 diabetes mellitus. Phase: Phase 3 Details Lead Sponsor: Merck Sharp & Dohme Corp.Treatments: MetforminSitagliptin Phosphate