While a professor at Georgetown University, he studied the antihistamine Seldane, which had been found to cause health problems.

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As precedent he cites the example of Seldane, an antihistamine developed by Hoechst Marion Roussel (now Aventis (nyse: AVE - news - people )) to treat hay fever.

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It took the better part of a decade for dangerous heart side effects to show up in Seldane, an antihistamine made by the company that became Aventis (nyse: AVE - news - people ).

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