When Did Merck Know Vioxx Was Deadly? - WebMD
Merck should have known Vioxx was deadly years before they pulled the drug from the market, a study of Merck’s own data suggests.
The study, published in the current issue of the Archives of Internal Medicine, is by Joseph S. Ross, MD, of Mount Sinai School of Medicine, and colleagues. The study authors were paid consultants to plaintiffs’ lawyers in Vioxx lawsuits — in which much of the Merck data first was revealed.
“By our analyses, the association is clear that by June 2001 — more than three years before the drug was eventually taken off the market — the risk could have been known,” Ross tells WebMD.
In their study of data from Merck-sponsored clinical trials, Ross and colleagues found that:
- By December 2000, data from 21 trials showed that the risk of a heart- or stroke-related adverse event (a cardiovascular thromboembolic event or CBT) or death (from all causes) was twice as high in Vioxx patients — but the finding was just shy of statistical significance, meaning it could have been a chance finding.
- By June 2001, pooled data showed Vioxx increased the risk of a CBT adverse event or death by 35% — a statistically significant finding, meaning it is unlikely to be a chance finding.
- By April 2002, adding new studies to the pooled data showed Vioxx increased the risk of CBT or death by 39%, a statistically significant finding.
- By September 2004, adding new studies to the pooled data showed Vioxx increased the risk of CBT or death by 43%, a statistically significant finding.
In a written statement and in an interview with WebMD, Merck says the study is flawed. It maintains that the company acted responsibly both in conducting safety studies and in pulling the $2 billion per year drug from the market as soon as it was aware that the drug increased the risk of heart attack and stroke.
“We fundamentally disagree with their conclusions that there was an actionable signal before September 2004,” Doug Watson, PhD, senior director of medical science for Merck Research Laboratories, tells WebMD.
Watson says that when Merck looked at the data, its researchers
See the original article here: https://www.webmd.com/arthritis/news/20091124/when-did-merck-know-vioxx-was-deadly
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