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Wyeth Sues Teva over Heartburn Drug Patent

Wyeth said Monday it will sue Teva Pharmaceuticals USA for alleged patent infringement and said it received an approvable letter from U.S regulators for bazedoxifene, a drug that helps prevent post-menopausal osteoporosis.

Wyeth claims that Teva's pantoprazole -- a generic version of Wyeth's Protonix -- infringes on a patent exclusively licensed to Wyeth. Protonix helps treat heartburn and other stomach ailments.

The drug company also said it received a second approvable letter from the U.S. Food and Drug Administration for bazedoxifene, a selective estrogen receptor modulator.