Idenix Pharmaceuticals received more bad news today after reporting that the FDA will require more preclinical data before it can proceed with clinical trials for its experimental hepatitis C drug IDX20963. In the following video, health-care analyst Max Macaluso discusses what this news means in the context of Idenix's previous drug development problems

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The article Down 30%: What Caused Idenix's Crash? originally appeared on Fool.com.

Max Macaluso, Ph.D. owns shares of Gilead Sciences. The Motley Fool recommends Gilead Sciences and Johnson & Johnson. The Motley Fool owns shares of Johnson & Johnson. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

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