Type 2 diabetes is increasing in prevalence and causes a significant health care burden due to associated microvascular and macrovascular complications. Type 2 diabetes is diagnosed by clinical findings of hyperglycemia and laboratory confirmation of elevated plasma glucose. Initial therapy includes diet and exercise, followed by the use of oral hypoglycemic agents and potentially subcutaneous insulin injections. Of the oral hypoglycemic agents currently available, metformin is the first-line choice. Recently, new adjunct therapies have been introduced that can improve glycemic control, although the long term effects on modifying the disease outcome in terms of diabetes complications remain to be seen. A review of the mechanism of action of current, non-insulin therapies will be presented. This review article will also discuss recent patents related to the field.