Chemical strucure of simvastatinSales, 2002-2004, as percentage of total during period.Sales, 2002-2004.
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Zocor

Simvastatin is a hypolipidemic drug belonging to the class of pharmaceuticals called "statins". It is used to control hypercholesterolemia (elevated cholesterol levels) and to prevent cardiovascular disease. more...

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Simvastatin is a synthetic derivate of a fermentation product of Aspergillus terreus.

Uses

Simvastatin is a powerful lipid-lowering drug that can decrease low density lipoprotein (LDL) levels by up to 50%. It is used in doses of 10 mg up to 80 mg. Higher doses (160 mg) have been found to be too toxic, while giving only minimal benefit in terms of lipid lowering. There is no real effect on HDL and triglyceride levels.

From recent research it has become apparent that simvastatin and other statins inhibit the progression of atherosclerosis beyond their effects on LDL. A large number of explanations has been proposed, for example its inhibitory effect on macrophages in the atherosclerotic plaque lesions.

Rationing

Since its introduction, there has been a large debate surrounding the price for lipid-lowering treatment and its benefits on atherosclerosis. Although this has affected the other statins as well, simvastatin was the first statin drug to be used extensively in clinical practice.

A number of large epidemiological studies were conducted to discover which patients would benefit most from statin drugs; most studies involve simvastatin as the study drug. The most influential studies were the Scandinavian Simvastatin Survival Study (4S) and the Heart protection study (HPS).

It has now become apparent that patients with one or more risk factors for cardiovascular disease (such as diabetes mellitus, hypertension or a positive family history) can benefit from statins—even if they do not have substantially elevated cholesterol levels.

Simvastatin was introduced in the late 1980s, and in many countries it is now available as a generic preparation. This has led to a decrease of the price of most statin drugs, and a reappraisal of the health economics of preventive statin treatment.

In the UK, simvastatin (in a dose of 10mg) has recently become available to purchase from pharmacies without prescription.

Pharmacology

All statins act by inhibiting HMG-CoA reductase, the rate-limiting enzyme of the HMG-CoA reductase pathway, the metabolic pathway responsible for the endogenous production of cholesterol.

The drug is the form of an inactive lactone that is hydrolized after ingestion to produce the active agent. It is a white, nonhygroscopic, crystalline powder that is practically insoluble in water, and freely soluble in chloroform, methanol and ethanol.

Marketing

Reference: Drug Discovery Today editorial, 2005

Brand names: Zocor®, Zocor Heart Pro®, marketed by the pharmaceutical company Merck & Co. and Denan (Germany), Liponorm, Sinvacor, Sivastin (Italy), Lipovas (Japan), Lodales (France), Zocord (Austria and Sweden) and other.

Read more at Wikipedia.org


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Vioxx causes Merck 'adverse effects'
From Drug Store News, 9/12/05 by Michael Johnsen

NEW YORK -- "If you suspect you or a loved one has suffered adverse effects resulting from Vioxx use ... recites one television commercial paid for by product liability litigators. The ads are becoming more and more prevalent--prime time on local television networks now that the first verdict of $253 million has bloodied the product liability waters. And that spells bad news for Merck.

Already facing some 5,000 individual lawsuits, the money verdict is expected to drive more people to sue Before the statute of limitations on Vioxx lawsuits expires this time next year. Some analysts have speculated as many as 100,000 cases may be filed claiming damages from the use of Vioxx.

Whether the withdrawal of a pharmaceutical product is self-imposed or initiated by the Food and Drug Administration, more and more of that action precipitates a flood of class-action and individual lawsuits seeking damages--damages that are payed out in the billions.

To date, Bayer has spent $1.1 billion settling more than 3,000 cases revolving around its statin drug Baycol, withdrawn in 2001. There are approximately 6,000 more cases worldwide, the company stated earlier this year. And Wyeth has set aside $21 billion so far in settlements of its weight-loss drug fen phen.

With some 5,000 Vioxx liability cases facing Merck, the pharmaceutical company's total payout may very well eclipse that of either Bayer or Wyeth--Merck's potential liability is pegged at a high of $50 billion (and a low of $4 billion). But right now, it's really too early to tell, analysts are saying.

"We do not think investors should apply [the Texas] ruling to the thousands of cases Merck faces," stated David Risinger in a recent Merrill Lynch analyst note. At the end of the day, that headline-grabbing settlement running in the hundreds of millions of dollars is going to be capped well under $30 million under Texas law, and the case may very well be appealed.

Rather, people should withhold judgment regarding Merck's potential liability until a few more verdicts are in--trials in New Jersey and again in Texas are expected to begin this month with a federal trial slated for later this year.

"Merck's win/loss rate in the next half-dozen or so trials is likely to drive investor sentiment regarding the company's theoretical liability," Risinger said.

It certainly doesn't look promising, however. According to published reports, Merck's defense was too clinical and sailed over the heads of jurors. In addition, jurors are zeroing in on the fact that Merck knew about the link to heart disease and Vioxx all along, citing internal communications that date well before the recall in 2004.

All of Merck's troubles have fueled merger speculation--analysts have been considering a marriage between Merck and Schering-Plough, its pharma partner on Zetia, for years. A more likely scenario would be a hostile takeover, especially if Merck's share value dips too low. However, many analysts have been skeptical regarding such a move--in addition to assuming the Vioxx liability, Merck is on the verge of losing two blockbuster medicines to generic competition and doesn't have the pipeline to restock those lost revenues in the coming years.

Indeed, Merck is looking at losing its biggest drug, Zocor, to generic competition next year. Zocor is projected to post sales of $4.4 billion in 2005, according to analysts. And the company stands to lose a $2 billion performer, Fosamax, in 2008.

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COPYRIGHT 2005 Gale Group

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