Abbott Laboratories develops, manufactures, and sells health care products worldwide. The company has four business segments; Pharmaceutical Products, Diagnostic Products, Nutritional Products, and Vascular Products. Notable pharmaceutical products include Norvir (HIV treatment), Humira (rheumatoid arthritis), and Meridia (obesity drug). The nutritional products division has popular brand like Similac (infant formula) and Ensure (nutritional supplements). The diagnostic systems division markets testing products and services for hospitals, laboratories, blood banks, and phyisician's offices. The vascular division focuses on products and treatments for blood and vascular diseases.