Teva and Cobalt challenge key US patents for Sepracor's Lunesta

18 Feb 2009

• By Nancy Faigen

Sepracor has received notice that Teva Pharmaceutical Industries and Cobalt Laboratories have filed ANDAs for generic versions of the sleep agent Lunesta (eszopiclone) tablets, which gained US regulatory clearance in December 2004.

Both ANDAs contain paragraph IV certifications alleging that one or more of Sepracor's patents listed in the FDA's Orange Book...

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