Teva Copied Zithromax Update: Pfizer Lawsuit

Law360, New York (February 10, 2006, 12:00 AM EST) -- Pfizer has followed through on its threat to sue generic drug maker Teva Pharmaceuticals USA for allegedly copying a patented improvement to its bronchitis and pneumonia antibiotic zithromax with its recently released generic version of the drug.

When zithromax came off patent protection in November 2005, Teva wasted no time launching its own version of azithromycin, the active ingredient in the drug. But Pfizer claims Teva’s generic is actually azithromycin sesquihydrate, a crystalline version of the chemical that Pfizer patented in December.

Pfizer filed the complaint...
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