Bayer "heroin" for the drug diacetylmorphine and marketed it as a cough suppressant and non-addictive substitute for morphine until 1910. Bayer also introduced phenobarbital; prontosil, the first widely used antibiotic and the subject of the 1939 Nobel Prize in Medicine; the antibiotic Cipro (ciprofloxacin); and Yaz (drospirenone) birth control pills. In 1925 Bayer was one of six chemical companies that merged to form IG Farben, the world's largest chemical and pharmaceutical company. The Allied Control Council seized IG Farben after World War II, because of its role in the Nazi war effort and involvement in the Holocaust, which included using slave
Bayer products in markets outside the US until 1985, including in Malaysia, Singapore, Indonesia, Japan and Argentina, to offload a product they were unable to sell in Europe and the US; they also continued manufacturing the unheated product for several months. Bayer said it did this because some countries were doubtful about the efficacy of the new product. Bayer has been involved in other controversies regarding its drug products. In the late 1990s it introduced a statin drug, Baycol (cerivastatin), but after 52 deaths were attributed to it, Bayer discontinued it in 2001. The side effect was rhabdomyolysis, causing renal failure,