* Health and Medical News:Acadia Pharma tanks on sudden CEO retirement

Acadia Pharmaceuticals fell more than 22 percent in after-hours trading Wednesday on news that its CEO is retiring.



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via Health and Medical NewsHealth and Medical News Pfizer Inc has already had its takeover overtures rebuffed three times by rival AstraZeneca Plc, but investors in the U.S. drugmaker say it can tolerate a little more rejection before going hostile with the deal. AstraZeneca turned down a sweeten...

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