A 24-Week Randomized, Double-blind, Double-Dummy, Multicenter Study to Compare the Efficacy of AVANDIA When Added to Submaximal Doses of Metformin and to Compare the Tolerability of the Combination to Metformin Monotherapy When Administered to Subjects With Type 2 Diabetes Mellitus

This was a randomized, double-blind, double dummy, multicenter study to assess the safety, efficacy and tolerability of the addition of RSG (rosiglitazone) to sub-maximal MET (metformin) combination relative to maximal MET monotherapy in subjects with type 2 DM (diabetes mellitus). The total duration of the study was approximately 20 months. The study consisted of a two-week washout period, a four to seven-week MET titration period, and a 24-week randomized treatment phase in which subjects, stratified by prior therapy, received either RSG + MET combination therapy or MET monotherapy.