Astellas Sues To Block Hospira's Generic Adenoscan

Law360, New York (May 24, 2012, 3:18 PM EDT) -- Astellas Pharma US Inc. hit injectable pharmaceuticals giant Hospira Inc. with a patent infringement lawsuit in Delaware federal court Wednesday over the rival's bid to market a generic version of Astellas' cardiac imaging agent Adenoscan.

Astellas and subsidiary Item Development AB said Hospira had filed an Abbreviated New Drug Application for a generic version of adenosine, an injectable fluid that replicates the stress placed on the heart during strenuous activity to allow for cardiac stress testing in patients physically unable to exercise.

If approved by the...
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