Bayer AG (; German: [ˈbaɪɐ] is a German multinational pharmaceutical and also life sciences company as well as among the biggest pharmaceutical firms in the world. Headquartered in Leverkusen, Bayer s locations of business consist of human as well as veterinary drugs; customer healthcare products; agricultural chemicals, seeds and biotechnology items. The company belongs of the Euro Stoxx 50 securities market index. Werner Baumann has been CEO given that 2016. Started in Barmen in 1863 as a dyestuffs manufacturing facility, Bayer s initial and best-known item was pain killers. In 1898 Bayer trademarked the name heroin for the drug diacetylmorphine and also marketed it as a coughing suppressant as well as non-addictive alternative to morphine up until 1910. Bayer also presented phenobarbital; prontosil, the very first extensively used antibiotic and also the subject of the 1939 Nobel Reward in Medicine; the antibiotic Cipro (ciprofloxacin); as well as Yaz (drospirenone) birth control pi...