1908-2000, pharmaceutical research/ manufacturer, Chicago, Illinois, USA, American G D Searle and Company 1908 - 2000
1880-1941, pharmaceutical manufacturer, London, England, British Burroughs Wellcome and Company Limited 1880 - 1941
active 1977-current (2008), pharmaceutical manufacturer, Roth, Bavaria, Germany, German Nutrichem GmbH 1977
1892-1950s, pharmaceutical manufacturer, Croydon, England (British branch of an American company) Anglo-American Pharmaceutical Company Limited 1892
1953-current (2009), pharmaceutical manufacturer, Hoddesdon, England Merck, Sharp and Dohme Limited 1953
active 1891-1970, pharmaceutical manufacturer, British arm of Amercian company Parke, Davis and Company Limited
active 1957-1993, pharmaceutical manufacturer, England Imperial Chemical Industries Limited (Pharmaceuticals Division)
active 1942-current (2009), pharmaceutical manufacturer, English Imperial Chemical (Pharmaceuticals) Limited
active 1906-1950s, pharmaceutical manufacturer of human and animal medicine, UK subsiduary, German Bayer Products Limited
active 1938-current (2009), pharmaceutical manufacturer, London, England Roussel Laboratories Limited
active 1948, manufacturers of food preparations and pharmaceuticals, Holmes Chapel, Cheshire Benger's Limited