Aventis is one of the worldæ¯ leading pharmaceutical companies, launched in December 1999 through the merger of Hoechst Marion Roussel and Rhone-Poulenc Rorer. For more than 120 years the forebears of Aventis have been answering the challenge of discovering and delivering pharmaceutical innovations and solutions. Our current focus is on diabetes, heart diseases, cancer, infections, bone & joint disorders, allergies and neurological diseases. ...