Following a 4-week single-blind placebo run-in period, eligible subjects were randomized in a 1:1 ratio to receive 32 weeks of double-blind study medication: Rosiglitazone (starting dose 4mg od) or Glyburide (starting dose 5mg od), both in combination with open-label Metformin > or = (1g/day). Subjects were stratified for use of ACEI, nondihydropyridine calcium channel blockers (NDP CCB), or angiotensin II receptor blockers (ARB) to provide equal representation of these subjects in each treatment group.