Given the high prevalence of type 2 diabetes and the 2- to 4-fold increased risk of fatal and non-fatal coronary heart disease events in these patients, long-term glycemic control is of great importance. TZDs improves glycemic control in patients with type 2 DM as well as enhances their insulin-mediated glucose disposal. However, the improvement of glycemic control seen with TZDs may be blunted in the long run by weight gain.