Elan Corporation (ELN)

Safe Harbor/Forward Looking Statements

This press release contains forward-looking statements regarding the potential for TYSABRI and the timing of the presentation of the two-year data from SENTINEL. These statements are based on the companies’ current beliefs and expectations, and are subject to risks and uncertainties that could cause actual results to differ materially. There is no assurance, for example, that TYSABRI is not linked to PML, that there are not or will not be more PML cases or other serious adverse events associated with TYSABRI or that we will be able to gain sufficient information to fully understand the risks associated with TYSABRI. There is also no assurance that the companies will be able to resume marketing and sales of TYSABRI in any indication. There is also no assurance that all experiences with TYSABRI will be the same or that the potential for TYSABRI will not be affected by unexpected new data or technical issues. For more detailed information on the risks and uncertainties associated with TYSABRI and the companies’ drug development and other activities, see the periodic and other reports of Biogen Idec Inc. and Elan Corporation, plc filed with the Securities and Exchange Commission. The companies assume no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.

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Safe Harbor/Forward Looking Statements

This press release contains forward-looking statements regarding the potential for TYSABRI. These statements are based on the companies’ current beliefs and expectations, and are subject to risks and uncertainties that could cause actual results to differ materially. There is no assurance, for example, that all experiences with TYSABRI will be the same or that the potential for TYSABRI will not be affected by unexpected new data or technical issues. The is no assurance that PML is not caused by TYSABRI, that there are not or will not be more PML cases or other serious adverse events associated with TYSABRI or that we will be able to gain sufficient information to fully understand the risks associated with TYSABRI. There is also no assurance that the companies will be able to resume marketing and sales of TYSABRI in any indication. For more detailed information on the risks and uncertainties associated with TYSABRI and the companies’ drug development and other activities, see the periodic and other reports of Biogen Idec Inc. and Elan Corporation, plc filed with the Securities and Exchange Commission. The companies assume no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.

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