This is a phase IV, randomized, open-label, parallel-arm, comparative and forced- titration study to compare the efficacy and safety of rosuvastatin versus simvastatin in patients with type 2 DM and dyslipidemia. When comparing the efficacy of rosuvastatin 20 mg with simvastatin 40 mg for the treatment of type 2 DM with dyslipidemia, rosuvastatin 20 mg is superior to simvastatin 40 mg in achieving the combined goal of LDL-C (<100 mg/dL) and non-HDL-C (<130 mg/dL).