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www.fdanews.com/articles/102606-wyeth-heartburn-drug-is-challenged-as-teva-launches-generic

Wyeth Heartburn Drug Is Challenged as Teva Launches Generic

December 26, 2007
Wyeth faces an uphill struggle to protect patent exclusivity for its blockbuster drug Protonix after Teva Pharmaceutical Industries Ltd. launched a generic version of the heartburn pill in the U.S. market.
The Wall Street Journal