Overview Efficacy and Long-Term Safety of Vildagliptin as Add-on Therapy to Metformin in Patients With Type 2 Diabetes Status: Completed Trial end date: 2011-03-01 Target enrollment: Participant gender: Summary This is a 2-3 period parallel group study with an adaptive element in Type 2 diabetes patients receiving vildagliptin as add-on therapy to metformin Phase: Phase 2/Phase 3 Details Lead Sponsor: Novartis PharmaceuticalsTreatments: MetforminSitagliptin PhosphateVildagliptin