The U.S. Food and Drug Administration (FDA) is notifying health care providers and patients of a problem with blood glucose meters made by Abbott Diabetes Care, Alameda, Calif. The meters can unintentionally be switched from one unit of measurement to another, resulting in an inaccurate blood glucose interpretation by the user. Users in the United States should make sure that their meter reading is displayed as mg/dL because an inaccurate reading can lead to taking the wrong dose of insulin or dietary changes, resulting in higher levels of sugar in the blood or hyperglycemia. Hyperglycemia can be a serious and even life-threatening condition and several cases of hyperglycemia have been reported to FDA.