Officials with the U.S. Food and Drug Administration (FDA) are warning people who have a history of certain kinds of heart disease not to use the weight-loss drug Meridia because it can boost these patients' risk of heart attack and stroke. FDA officials say people with a history of coronary artery disease, stroke or transient ischemic attack ("mini-stroke"), heart arrhythmias, peripheral arterial disease, congestive heart failure, or uncontrolled high blood pressure should avoid taking...