Astra Zeneca is an English-Swedish multinational company specialized in the manufacture of pharmaceuticals and biopharmaceuticals. The company was founded in 1999 through the merger of the Swedish companies Astra and English Zenica Company .
GlaxoSmithKline is a global British pharmaceutical company, which conducts biological research, vaccine production and consumer health medicines. GlaxoSmithKline is the fourth largest consumer pharmaceutical company in the world
Hoffman-La Roche is a Swiss international medical care company and operates globally through two main sectors: pharmaceutical and diagnostic industries. Roche is a holding company whose shares are traded on the Swiss exchange
Bayer Health Care Pharmaceuticals Bayer Health Care is a multinational research and pharmaceutical company
Novartis International is a multinational pharmaceutical company and one of the largest healthcare companies in the world and is a leading giant among pharmaceutical companies, and ranks number one in terms of income
Sanofi is a French company, the largest manufacturer of medical vaccines in the world and ranked fifth in terms of sales. The company was established under the name Sanofi-Aventis in 2004 after the merger of Aventis and Sanofi-SintiLabo, originally created after the merger of several other companies in advance, Sanofi in March 2011
Pfizer is a global pharmaceutical company based in New York - the United States, named after its founder, Charles Pfizer (1906-1824), is the manufacturer of Leptor, the most widely used drug ever used to lower cholesterol levels.