Re Prilosec Patent

AstraZeneca PLC 2 May 2001 COURT DENIES GENERIC'S APPLICATION FOR SUMMARY JUDGEMENT ON PRILOSEC PATENT AstraZeneca announced today that the United States District Court for the Southern District of New York has denied a summary judgement motion filed by Reddy-Cheminor alleging invalidity of a patent (US patent no:4,255,431) at issue in a lawsuit. The patent relates to omeprazole, the active ingredient in Prilosec, a treatment for stomach acid disorders. For Further Information: Media Enquiries: Steve Brown - Tel: +44 (0) 207 304 5033, Chris Major - Tel: +44 (0) 207 304 5028 Investor Relations: Michael Olsson - Tel: +44 (0) 207 304 5087

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