Vytorin and Zetia fail in heart study
Millions of Americans already take the drug or one of its components, Zetia. But doctors were stunned to learn that Vytorin failed to improve heart disease even though it worked as intended to reduce three key risk factors.
"People need to turn back to statins," said Yale University cardiologist Dr. Harlan Krumholz, referring to Lipitor, Crestor and other widely used brands. "We know that statins are good drugs. We know that they reduce risks."
The study was closely watched because Zetia and Vytorin have racked up $5 billion in sales despite limited proof of benefit. Two congressional panels launched probes into why it took drugmakers nearly two years after the study's completion to release results.
Results were presented at an American College of Cardiology conference in Chicago Sunday and published on the Internet by the New England Journal of Medicine.
Doctors have long focused on lowering LDL or bad cholesterol as a way to prevent heart disease. Statins like Merck & Co.'s Zocor, which recently came out in generic form, do this, as do niacin, fibrates and other medicines.
The study tested whether Vytorin was better than Zocor alone at limiting plaque buildup in the arteries of 720 people with super high cholesterol because of a gene disorder.
The results show the drug had "no result — zilch. In no subgroup, in no segment, was there any added benefit" for reducing plaque, said Dr. John Kastelein, the Dutch scientist who led the study.
That happened even though Vytorin dramatically lowered LDL, fats in the blood called triglycerides and a measure of artery inflammation — CRP.
Some doctors noted that hormone pills for menopausal women and torcetrapib, a promising cholesterol drug Pfizer Inc. recently abandoned, also lowered cholesterol but were found in big studies to raise heart risks, not lower them.
Another ominous sign was the decision Friday by other researchers to expand enrollment in a more pivotal study of Vytorin to 18,000 people because early results suggest it will be harder than anticipated to see if it is any better than Zocor alone.
"It will be 2012 — ten years after the drug was introduced — before we know the answer," said Dr. Steven Nissen, a Cleveland Clinic cardiologist who has no role in the studies and has criticized the drugmakers over the one reported Sunday.
Dr. Robert Spiegel, chief medical officer for Schering-Plough, said the study was done "with the highest integrity" and that doctors can believe the results "because of the time we took to make sure the data are right."
Recent comments
First, numbers don't lie. Second, there has been other statins...
Have Funn | April 3, 2008 at 8:09 a.m.
I took vytorin for 6 months, while it lowered my over all cholesterol...
side effects | April 1, 2008 at 8:56 a.m.
I'm also taking Vytorin, and my LDL cholesterol levels dropped...
veedub | March 31, 2008 at 1:17 p.m.
