Research Update: AZD3582

AstraZeneca PLC 18 February 2003 RESEARCH UPDATE ON AZD3582 AstraZeneca and NicOx today announced that AZD3582, in development for the treatment of acute and chronic nociceptive pain, showed efficacy in a recently completed Phase II clinical study, but did not reach its primary end point with respect to gastro-intestinal ulcers. The majority of the secondary objectives, including protection against gastro-intestinal damage (when ulcers and erosions are combined), were achieved and overall AZD3582 was well tolerated. AstraZeneca remains committed to the completion of the ongoing AZD3582 Phase II development programme. AstraZeneca, together with NicOx, will review the data generated from the several ongoing AZD3582 Phase II clinical studies in the programme in order to decide on the further development plans for AZD3582 and the CINOD class. 18 February 2003 Media Enquiries: Emily Denney, Tel: +44 (0) 207 304 5034 Steve Brown, Tel: +44 (0) 207 304 5033 Investor Relations: Mina Blair Robinson, Tel: +44 (0) 207 304 5084 Jonathan Hunt, Tel: +44 (0) 207 304 5087 - Ends - This information is provided by RNS The company news service from the London Stock Exchange

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