The Federal Motor Carrier Safety Administration issued a warning Thursday on the anti-smoking drug Chantix, advising medical examiners "to not qualify anyone currently using this medication for commercial motor vehicle licenses." The FMCSA oversees the interstate trucking and bus industry. Chantix, made by Pfizer, Inc., was attacked in a study by a non-profit group on Wednesday for possible links to seizures, dizziness, heart irregularity, diabetes and more than 100 accidents. The Department of Transportation alerted its agencies about the study, asking the office directors be aware of the report's warnings and recommendations. The Federal Aviation Administration banned the drug for...