Date:1/28/2008

risks and uncertainties, many of which are difficult to predict and generally beyond the control of sanofi-aventis, that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include among other things, the uncertainties inherent in research and development, future clinical data and analysis, including post marketing, decisions by regulatory authorities, such as the FDA or the EMEA, regarding whether and when to approve any drug, device or biological application that may be filed for any such product candidates as well as their decisions regarding labeling and other matters that could affect the availability or commercial potential of such products candidates, the absence of guarantee that the products candidates if approved will be commercially successful, the future approval and commercial success of therapeutic alternatives as well as those discussed or identified in the public filings with the SEC and the AMF made by sanofi-aventis, including those listed under "Risk Factors" and "Cautionary Statement Regarding Forward-Looking Statements" in sanofi-aventis' annual report on Form 20-F for the year ended December 31, 2006. Other than as required by applicable law, sanofi-aventis does not undertake any obligation to update or revise any forward-looking information or statements.

1. Cohen AT et al. A large-scale, global observational study of venous thromboembolism risk and prophylaxis in the acute hospital care setting: the ENDORSE study. Abstract Ndegrees 1827, International Society on Thrombosis and Haemostasis, Geneva, 8 July 2007.

2. The seventh ACCP conference on Antithrombotic and Thrombotic Therapy. Chest. 2004.

3. Cohen AT on behalf of the VTE Impact Assessment Group in Europe (VITAE). Venous Thromboembolism (VTE) in Europe: The number of VTE events and associated morbidity and mortality. Thromb
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