Pfizer Inc., discovers, develops, manufacturers, and markets leading prescription medicine for humans and animals and many of the world's best-known consumer brands. Their innovative, value-added products improve the quality of life of people around the world and help them enjoy longer, healthier, and more productive lives. The company has three business segments: health care, animal health and consumer health care. The top three worldwide pharmaceutical companies in sales are from GlaxoSmithKline, Pfizer and Merck respectively. In 2001, Pfizer increased its' market share and became t…