Regulatory Approval

AstraZeneca PLC 21 February 2001 ASTRAZENECA PLC FDA APPROVES ASTRAZENECA'S NEXIUM WITH COMPREHENSIVE SET OF INDICATIONS London - AstraZeneca confirms it will launch Nexium during March in the US, following its approval by the US Food and Drug Administration (FDA) and the announcement of the catalogue price to wholesalers. Tom McKillop, Chief Executive of AstraZeneca said, 'We are delighted to receive FDA approval for all indications sought for Nexium. The US label compares favourably with both the US Prilosec label and with those received so far in Europe for Nexium which has had launches among the best in the pharmaceutical industry's history. Nexium will be available on prescription in the US in March. 'We are very well prepared to launch Nexium in the US and with this label we are confident of retaining our global leadership of the gastro-intestinal market'. The FDA has approved Nexium with a comprehensive set of indications as follows: - Heartburn and other symptoms associated with gastro-esophageal reflux disease (GERD). - The healing and symptom resolution of erosive esophagitis, a potentially serious condition associated with GERD. - The maintenance of both healing and symptom resolution of esophagitis. - The eradication of Helicobacter pylori infection in patients with duodenal ulcer disease in 10 days, in combination with certain antibiotics. The label confirms that Nexium 40mg demonstrates higher healing rates in erosive esophagitis than Prilosec 20mg (the approved dose for this indication). In three studies, Nexium 40mg consistently demonstrated higher healing rates than Prilosec 20mg and two of these studies were statistically significant. Healing rates achieved for Nexium 20mg were between those achieved with Nexium 40mg and Prilosec 20mg. Sustained resolution of heartburn was achieved in 5 days for Nexium 40mg; 7-8 days for Nexium 20mg against 7-9 days for Prilosec 20mg. After four weeks of 40mg Nexium treatment, a higher percentage of patients achieved sustained resolution of heartburn than with Prilosec 20mg. In clinical trials, the safety profile of Nexium was similar to that of Prilosec. The most frequently occurring side effects were headache, diarrhoea and abdominal pain. The catalogue price to wholesalers has been set at $3.33 for either a Nexium 20mg or Nexium 40mg capsule. The catalogue price to wholesalers of Prilosec 20mg is $3.45. AstraZeneca is a major international healthcare business engaged in the research, development, manufacture and marketing of ethical (prescription) pharmaceuticals and the supply of healthcare services. It is one of the top five pharmaceutical companies in the world with healthcare sales of $15.8 billion and leading positions in cardiovascular, gastrointestinal, oncology, anaesthesia including pain management, central nervous system (CNS) and respiratory products. The US Nexium label is available on the US AstraZeneca website - www.astrazeneca-us.com. AstraZeneca PLC will be conducting a conference call for analysts and the media at 0900 hrs GMT (Europe and US lines available) and 1630 hrs GMT (Europe and US lines available) on Wednesday, 21 February, as follows: 09.00 GMT / 04.00 EST Analysts (UK) 0800 027 0199 / 0800 027 1111 Analysts (rest of Europe) +44 (0) 8700 559 377 / +44 (0) 8700 559 381 Analysts (US) +1 212 346 6435 / 800 340 5810 Media + 44 (0) 8700 559 363 / 0800 027 2020 16.30 GMT / 11.30 EST Analysts (UK) 0800 027 0199 / 0800 027 1111 Analysts (rest of Europe) +44 (0) 8700 559 377 / +44 (0) 8700 559 381 Analysts (US) + 1 415 908 6221 / 800 416 4516 Media + 44 (0) 8700 559 363 / 0800 027 2020 The Conference Call will be replayed until 28 February 2001 on the following numbers : UK Replay access : +44 (0) 141 566 8866 or 0800 027 0225 Client Identity Number : 507 Passcode : 130 Hash US Replay access : 1 858 812 6440 or 800 633 8284 Passcode : 18064389 Hash This press release contains forward-looking statements with respect to the business of AstraZeneca. By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that will occur in the future. There are a number of factors that could cause actual results and developments to differ materially. For a discussion of the risks and uncertainties please see the Company's Annual Report/Form 20-F for 1999. 21 February 2001 Further enquiries to: Media Relations: Steve Brown: Tel +44 (0) 20 7304 5033 Lucy Williams: Tel +44 (0) 20 7304 5034 Investor Relations: Michael Olsson: Tel +44 (0) 20 7304 5087

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