Since the approval of cholesterol drug Lipitor, Pfizer pharmaceutical has become a leader in pharmaceutical sales. Since 1996 sales of Lipitor have exceeded $125 billion and the drug has been named one of the top largest selling pharmaceutical along with several other Pfizer products.
Primarily used for lowering blood cholesterol, Lipitor works by blocking a type of protein made in your body, also known as an enzyme, in the liver. The less of this enzyme your liver produces, the less cholesterol is made. Lipitor can also lower the risk of heart attack and stroke among patients with diabetes.