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AlsoAmgen Inc. said it discovered two more...

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Amgen Inc. said it discovered two more counterfeit lots of its Epogen anemia drug, after warning this month that one lot of Epogen vials had about one-twentieth of the required amount of the active ingredient. A May 24 letter from the world’s biggest biotechnology firm was posted on the Food and Drug Administration’s Web site about the newly discovered counterfeit Epogen. The company did not give details on the new problem.

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