From diabetes drugs to spine surgery products, scandals involving concealed data have mounted. Consider the cases of two heart drugs that were the subject of Milwaukee Journal Sentinel stories:
For two years, Schering-Plough, the maker of the popular cholesterol drug Vytorin, sat on the results of a clinical trial showing the drug provided no benefit in improving artery health. During that time the drug was heavily marketed to consumers in TV ads. The situation came to light in 2008 after a congressional investigation was launched.
In 2003, a clinical trial of Multaq, a drug that treated irregular heartbeat, was stopped because more patients who were getting the drug were dying than those who were getting a placebo. However, the study was not published until five years later.
In 2007, an independent analysis of the diabetes drug Avandia found that the drug increased heart attacks and cardiovascular deaths.
Steve Nissen, the lead author of the analysis, said 35 of the 42 studies he looked at were unpublished and were obtained only because a court case required the drug's maker, GlaxoSmithKline, to turn over the data.
"Had the medical community known about this hazard, Avandia would likely never have become the world's largest selling diabetes drug," said Nissen, chairman of cardiovascular medicine at the Cleveland Clinic. "Our ability to provide the best care for patients is dependent on access to all of the available clinical trial evidence, regardless of whether the study showed favorable results."
While much of the criticism of suppressed medical research has been aimed at drug companies, research data from medical devices also has been delayed, especially when it reflects negatively on a product.
Critics pointed to Medtronic's bone-growth stimulating back surgery product known as Infuse.
Last year, the Journal Sentinel reported that the results of a crucial clinical trial of the product were not published until nearly five years after the trial had to be halted because unwanted bone was growing around the spines of the trial volunteers. The paper was written by surgeons who have received millions of dollars in royalties from other Medtronic spine products.
What's more, the authors of the belated paper downplayed the bone overgrowth, saying it did not harm patients, a claim that was flatly refuted by a doctor interviewed by the Journal Sentinel.
The doctor, an Oklahoma orthopedic surgeon, said two of his patients who were in the trial had to undergo additional surgery because the bone overgrowth was painfully impinging on nerve roots. One of the patients, a man who was in his 50s at the time, needed three operations - one for the implant, a second to remove the unwanted bone formation, and a third when the additional bone grew back yet again.
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