Conducting research in the areas of cardiovascular disease, central nervous system disorders, immunology and infectious disease, oncology, respiratory diseases and women's health, its best-selling products are Vytorin, Zetia, Remicade and Nasonex.

CNN: Schering-Plough facts

Eventually Wright found a specialist and was diagnosed with multiple sclerosis, a debilitating disease that involves the immune system attacking the central nervous system.

CNN: First NBA player with MS takes the court

Huntington's disease is an hereditary neurological disorder of the central nervous system that causes progressive degeneration of cells in the brain, slowly impairing a person's ability to walk, think, talk and reason.

BBC: Rookwood Hospital, Cardiff

Elan and American Home Products have ended trials of their Alzheimer's vaccine--once seen as one of the most promising new approaches to treating the disease--after 15 patients suffered a potentially serious side effect: swelling of the central nervous system.

FORBES: Magazine Article

Meningitis is an aggressive disease when bacteria invade the protective membranes of the central nervous system and cause adverse inflammatory responses.

FORBES: Corporate Entrepreneurship: Eliminating Disease via Public-Private Partnerships

Lupus is an autoimmune disease characterized by inflammation of the joints, skin, major organs and central nervous system as the immune system attacks healthy tissues and cells.

FORBES: Lupus Treatment Evades Genentech, Biogen