Pfizer is the largest pharmaceutical company in the world operating in the Healthcare sector. The company generated $58.99 billion in revenues in 2012 and its net income was $14.6 billion for the same year. Pfizer has been producing blockbuster drugs since 1950, the most profitable of which has been Lipitor, a cholesterol-lowering medicine. The company operates in five business segments which include Primary Care, Specialty Care and Oncology, Established Products and Emerging Markets, Consumer Healthcare and Animal Healthcare. Pharmaceutical products which are mainly under Primary Care generated 74% of the 2012 revenues. Animal Healthcare and Vaccines (which comes under Specialty Care) generated 7% of the revenues each in 2012 and Consumer Health and Alliances generated 6%.