FDA panel revisits Avandia, likely too late for diabetes drug

By David Morgan WASHINGTON (Reuters) – A U.S. Food and Drug Administration panel of outside experts reopened one of the biggest drug controversies in recent years on Wednesday at a meeting where they will decide whether to recommend lifting marketing restrictions on GlaxoSmithKline Plc's Avandia diabetes drug. The two-day FDA advisory committee meeting is not expected to bring about a major boost in sales for the onetime multibillion dollar product. But its findings may help revive the credibility of the British drugmaker's original research and shed light on the current U.S. …