Are brand name "cholesterol" drugs more effective?

From the Wall Street Journal article:

Merck & Co. and Schering-Plough Corp. defended their actions Friday involving a recently released study that raised questions about the effectiveness of cholesterol drugs Vytorin and Zetia.

The Food and Drug Adminstration, meanwhile, said it will review the partially completed study once it has been finished.

The companies are being sued in several states over allegations they misled consumers into thinking the drugs were more effective than generics. In a statement Friday, the companies said they acted "with integrity and good faith."

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