Sanofi develops and manufactures prescription and over-the-counter drugs and vaccines for mankind and man's best friend. The company's pharmaceutical division is focused on diabetes, cardiovascular, and multiple sclerosis products, among others. Its biggest revenue generators include insulin brand Lantus and blood thinners Plavix and Lovenox. The company also operates vaccine maker Sanofi Pasteur and Merial, one of the world's largest animal health firms, which it is selling. The US is Sanofi's largest market, but it operates worldwide.