Vytorin combines simvastatin (sold as in individual ingredient under the brand name Zocor) and ezetimibe (also known as Zetia) to reduce the production of “bad” cholesterol. An FDA review of data from clinical studies, adverse event reports, and prescription use of simvastatin indicated patients who took doses of 80 mg or more of simvastatin were at greater risk for developing a muscle injury known as myopathy. Myopathy, which causes pain, tenderness or weakness, is a known side effect of all statin drugs. Myopathy can lead to rhabdomyolysis, a more serious condition that can lead to kidney failure, which can be fatal.

Much of the data reviewed by the FDA came from the Study of the Effectiveness of Additional Reductions in Cholesterol and Homocysteine (SEARCH), a clinical trial aimed to better understand the relationship between high-dose simvastatin use and muscle injury.

Vytorin also carries a risk of liver damage and liver problems such as hepatitis, cirrhosis and even liver failure. A February 2008 study also found that Vytorin was no more effective than simvastatin alone in lowering cholesterol, and that patients taking Vytorin actually had more plaque buildup than patients taking simvastatin alone.

SOURCE: Vytorin Recall › FDA warns of link between cholesterol drug, muscle injury

The SEAS study sought to test Vytorin’s effectiveness as an alternative to surgery in reducing arterial clogging caused by high cholesterol. The results, which were announced in a July 2008 press conference, did not favor the drug. Not only did researchers find that Vytorin worked no better than cheaper, generic statins, they also discovered that patients taking Vytorin experienced 50 percent more new cancer cases and cancer deaths than the subjects who took placebos.

Merck and some of the researchers connected to the SEAS study dismissed the results as a “fluke,” while many physicians and medical researchers not connected to the drug company remained skeptical and cautioned consumers to stick with traditional statins to control cholesterol levels. For instance, Merck’s Zocor, taken alone, was shown to be more effective than Vytorin and cost about one-third as much because it had become available as a generic drug.

That research promoted many municipalities that had included Vytorin in their health plans to file lawsuits against Merck, essentially asking for their money back. Vytorin and its sister drug Zetia, made by Schering-Plough, brought in sales of more than $5 billion at their peak. The sales have fallen but continue to earn $4 billion annually.

Vytorin is a hybrid drug which combines Merck’s Zocor with Schering-Plough’s Zetia to combat both dietary and hereditary cholesterol. The FDA said that ample evidence exists showing Zocor to be safe, but insufficient evidence exists on Zetia to “rule out a cancer risk at this time.”

Two additional Vytorin studies known by the acronyms SHARP and IMPROVE-IT are ongoing and scheduled to end in 2010 and 2012.

SOURCE: Vytorin Recall › FDA says it finds no Vytorin-cancer link, but unsure

Merck

The Enhance study revealed that the pairing of Schering-Plough’s Zetia and Merck’s Zocor, which constitutes Vytorin, to be no more effective and possibly even less effective than Zocor alone or other much cheaper, generic statins in treating arterial plaque.

But more than the disappointing results, there was the delay in making this information public. Results of the Enhance trial were completed in April 2006 but were not released until January 2008, after mounting pressure and suspicion over the delay.

Many plaintiffs, including a number of municipalities, sued Merck and Schering-Plough upon discovering that the drug makers knew the results of the Enhance trial but withheld them from the public for up to 2 years. The trial revealed Vytorin to be no more effective than cheaper generic statins in controlling cholesterol.

Nevertheless, the drug makers forged ahead with aggressive marketing campaigns for Vytorin, earning billions while allegedly knowing about the drug’s shortcomings.

Last month, Merck and Schering agreed to settle with attorneys general from 35 states who claimed the drug makers improperly marketed Vytorin and Zetia. Merck agreed to pay the states $5.4 million for costs accrued in investigating the potential violations of consumer-protection laws.

The settlement announced this week resolves all of the lawsuits seeking class-action status that were filed in New Jersey federal courts by consumers who bought and used Vytorin or Zetia. Many of the complaints sought compensation for personal injury caused by the drugs. The SEAS trial uncovered a possible link between Vytorin and higher cancer risks.

Lawsuits against the companies over securities law violations are still pending, as is the U.S. Department of Justice’s investigation into whether the drug makers’ marketing tactics led to false claims being submitted to federal healthcare programs. Moreover, congressional committees continue to inquire about the companies’ handling of the Enhance trial.

SOURCE: Vytorin Recall › Merck and Schering pay $41.5 million to settle NJ lawsuits