Schering-Plough CEO Fred Hassan has been ordered to testify via videotape in a trial over the painkiller Celebrex, which Pfizer acquired in its merger with Pharmacia--the company that was headed up by Hassan when Celebrex was launched. Though Pfizer has settled some Celebrex lawsuits, brought by plaintiffs who said the painkiller caused their heart attacks or strokes, this is the first such suit to reach trial. Report