Pioglitazone, a drug used for type 2 diabetes, may prevent recurrent stroke and heart attacks in people with insulin resistance but without diabetes. The results of the Insulin Resistance Intervention after Stroke (IRIS) trial, presented at the International Stroke Conference 2016 in Los Angeles and published in the New England Journal of Medicine, suggest a potential new method to prevent stroke and heart attack in high-risk patients who have already had one stroke or transient ischemic attack. This large, international study was supported by the National Institutes of Health’s National Institute of Neurological Disorders and Stroke (NINDS).