Merck blood clot drug in limbo after mixed results

CHICAGO (Reuters) - Impressive efficacy but worrisome bleeding was seen for a new type of blood clot preventer tested by Merck & Co in one of the largest heart-drug studies ever conducted, researchers said on Saturday, raising questions whether the company will seek approval of the drug and whether it can pass muster with regulators.

Source: http://feeds.reuters.com/~r/reuters/healthNews/~3/U_hrFFA72_0/us-heart-clot-merck-idUSBRE82N07P20120324

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