Settling thousands of legal claims regarding heart attacks and strokes suffered by people who took the painkiller Vioxx will cost the drug’s maker at least $4.85 billion, according to the law firm administering the settlement fund.In a report today on Bloomberg.com, attorneys said the fund will be used to settle about 3,000 claims from Vioxx users who died of heart attacks and 122 others who suffered strokes while on the drug. Vioxx debuted in 1999, but was pulled from the market in 2004 after s