Pfizer points an analysis of Lipitor showed the drug reduced the risk of stroke and coronary heart events in type 2 diabetes patients who had no known coronary heart disease but who had experienced a recent stroke or mini-stroke.Pfizer said the study showed Lipitor reduced the risk of stroke by 30% and coronary heart disease events and major coronary events by 51%. The company said according to the National Institute of Diabetes and Digestive and Kidney Diseases, the risk for stroke is two to four times higher among people with diabetes, and heart disease and stroke account for nearly two-thirds of deaths in people with the condition.