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SILVER SPRING, Md., Nov. 30, 2011 /PRNewswire-USNewswire/ -- The U.S.

The U.S. Food and Drug Administration initiated a block on Tuesday of more than 30 generic drugs produced by Ranbaxy Laboratories Ltd. – India’s biggest pharmaceutical company.

The U.S. Food and Drug Administration has issued warning letters and an import alert for generic drugs produced by Ranbaxy Laboratories Ltd. of India. The warning letters identify the FDA's concerns about alleged deviations from U.S.

By RAJESH MAHAPATRA NEW DELHI - India's Ranbaxy Laboratories Ltd. has withdrawn its bid for the generic drug unit of German pharmaceutical company Merck KGaA because it was found to be overvalued, a person familiar with the deal said Tuesday.