And the drug giant Merck has been ordered to pay at least $4.5 million to a man who says the painkiller Vioxx gave him a heart attack. Vioxx was withdrawn two years ago after a study speculated it doubled the risk of heart attacks after 18 months of use. Merck has alloted over $900 million to fight at least 10,000 lawsuits filed over Vioxx use. The company has vowed it will not settle a single case.