When the immune system fights back, Centocor is there. The Johnson & Johnson subsidiary makes the drug Remicade for autoimmune conditions Crohn's disease (a debilitating bowel disorder) and rheumatoid arthritis (a multi-billion dollar market). It also develops cardiovascular and cancer drugs. The company's current offerings include ReoPro, which prevents blood clots during angioplasty and is marketed primarily by Eli Lilly; Retavase, a clot-buster used during heart attacks; Fragmin, which treats angina and prevents complications during a heart attack and is sold by Pfizer; and Panorex, a colorectal cancer treatment marketed only in Germany by GlaxoSmithKline.