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Drug maker pulls popular arthritis pills off market
TRENTON, N.J. -- Vioxx, the blockbuster arthritis drug heavily promoted on television and taken by tens of millions of people, was pulled from the market by its maker Thursday after a study found it doubled the risk of heart attacks and strokes.
Experts advised patients to immediately stop taking Vioxx and talk to their doctors about alternatives.
"Given the availability of alternative therapies, and the questions raised by the data, we concluded that a voluntary withdrawal is the responsible course to take," said Ray V. Gilmartin, chairman, president and chief executive of Merck & Co.
The news of Vioxx's dangers came five years after Merck put the drug on the market with great fanfare. Vioxx has since become one of the world's most aggressively marketed drugs, advertised in magazines and in TV commercials, with celebrity endorsements from former athletes Dorothy Hamill and Bruce Jenner.
The withdrawal marks a serious blow to New Jersey-based Merck, one of the world's biggest drug makers. Vioxx accounted for $2.5 billion in worldwide sales in 2003, and 84 million prescriptions have been filled since the drug's introduction. An estimated 2 million people are now using it.
Merck stock plunged $12.07, or nearly 27 percent, to close at $33 in extremely heavy trading, wiping out $28 billion in market value. Merck also dragged down the Dow Jones industrial average, which was off by more than 55 points.
Merck said patients with leftover pills can mail them back to the company for a refund. Vioxx is costly, with a 30-day supply costing about $100, far more than generic pain relievers.
Vioxx, which is also prescribed for acute pain and disorders such as carpal tunnel syndrome, is seen as a potential cancer-prevention medicine as well. In fact, the recall was prompted by a three-year study aimed at showing that the drug could prevent the recurrence of potentially cancerous polyps in the colon and rectum.
Participants taking Vioxx for more than 18 months were found to be twice as likely as those given dummy pills to suffer a heart attack, stroke or other heart complications. During the study, 10 patients died, five who had been taking Vioxx and five who took dummy pills.
The Food and Drug Administration said there were early signs of potential problems with Vioxx. A Merck study led to warnings about heart risks being placed on the drug's label in 2002, and the FDA has been monitoring problems that have been reported since then.
"This is not a total surprise," said Dr. Steven Galson, acting director of the FDA's Center for Drug Evaluation and Research.
Vioxx is part of a class of anti-inflammatory drugs called cox-2 inhibitors that have been heavily touted by the pharmaceutical industry as being more effective and having fewer side effects, particularly on the stomach, than older drugs. Pfizer's Celebrex and Bextra are also cox-2 inhibitors. But so far there has been no evidence that these other drugs pose any dangers to the heart.
Officials do not yet know how Vioxx may be causing the increased risk.
Alternatives to Vioxx include generic pain relievers such as ibuprofen and aspirin, as well as Celebrex.
"There are very few patients for whom there won't be a good alternative drug," said Dr. Steven Abramson, director of rheumatology at New York University Hospital for Joint Diseases.
Abramson said there is no reason for those who used Vioxx in the past to panic; he said there is no evidence that the elevated risk of heart attack persists after a patient has stopped taking the drug.
In the study that was halted, 45 of the 1,287 people taking Vioxx had heart attacks or other cardiovascular problems versus 25 out of the 1,299 who got dummy pills, Merck reported. That translated to 3.5 percent of patients on the drug and only 1.9 percent on placebo, according to the FDA.
Personal-injury lawyers have already begun circling Merck, with at least one announcing plans for a class-action lawsuit. Another claimed he already represents 58 patients around the country allegedly harmed by Vioxx, including people who suffered a heart attack, stroke, internal bleeding or kidney failure.