Sanofi-Aventis cover seven major therapeutic areas: cardiovascular, thrombosis, oncology, diabetes, central nervous system, internal medicine and vaccines. The company engages in the research, development, manufacturing and marketing of pharmaceutical products for sale principally in the prescription market, but they also develop over-the-counter medication.
Aventis was formed in 1999 when Rhône-Poulenc S.A. merged with Hoechst AG. The merged company was based in Strasbourg, France. In 2004 Aventis was purchased by Sanofi-Synthélabo and became a part of Sanofi-Aventis, one of the five largest pharmaceutical companies in the world (along with Pfizer, Bristol-Myers Squibb, Novartis, and GlaxoSmithKline).