Sanofi — Report Publication Announcement 2010

Mar 1, 2011

Filing of the 2010 U.S. Form 20-F and French "Document de Référence" containing the Annual Financial Report

Paris, France – March 1, 2011 - Sanofi-aventis (EURONEXT: SAN and NYSE: SNY) announces today the filing of its Form 20-F with the U.S. Securities and Exchange Commission (SEC) and its "Document de Référence" containing its Annual Financial Report with the French market regulator Autorité des marchés financiers (AMF).

These documents are available on the "Investors" page of the company's corporate website (www.sanofi-aventis.com), under the heading "Regulated Information in France". In addition, the Form 20-F is available on the website of the SEC (www.sec.gov) and the "Document de Référence" is available on the website of the AMF (www.amf-france.org). Shareholders may receive a hard copy of these documents, each of which contains our complete audited financial statements, free of charge, upon request.

About sanofi-aventis

Sanofi-aventis, a leading global pharmaceutical company, discovers, develops and distributes therapeutic solutions to improve the lives of everyone. Sanofi-aventis is listed in Paris (EURONEXT : SAN) and in New York (NYSE : SNY). For more information, visit: www.sanofi-aventis.com.