News Release


Kyorin Announces the Filing of a Lawsuit for Patent Infringment Aganist TEVA in the United States

March 24, 2004

KYORIN Pharmaceutical Co., Ltd. (Headquarters: Tokyo, President: Ikuo Ogihara) announces that on March 23, 2004 (U.S. time) it and Bristol-Myers Squibb Company filed a lawsuit against TEVA Pharmaceuticals USA, Inc. and TEVA Pharmaceutical Industries Ltd. in the United States District Court for the Southern District of New York alleging infringement of Kyorin's U.S.

Patent 4,980,470 covering quinolone antibacterial compounds. The lawsuit was filed in response to TEVA's submission of an abbreviated new drug application (ANDA) to market a generic version of Tequin® (INN: gatifloxacin).

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