In this video, David Williamson describes how Achillion Pharmaceuticals (NASDAQ:ACHN) may challenge Gilead's (NASDAQ:GILD) dominance in the Hepatitis C drug market. Achillion is concluding phase 2 clinical trials of its oral interferon medication, and so far, things are looking good. If successful in phase 3 trials, Achillion could directly challenge Gilead's interferon medication. For investors, the success of Achillion's drug is attractive, but the potential for Achillion to be a takeover target is even more enticing. The company has a market cap of around $575 million and could easily be bought out by the likes of Bristol-Myers Squibb.

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David Williamson has no position in any stocks mentioned. The Motley Fool recommends Gilead Sciences. Try any of our Foolish newsletter services free for 30 days. We Fools don't 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.