The document discusses the role and responsibilities of Medical Affairs departments within pharmaceutical companies. It describes how Medical Affairs operates medical information functions, provides insights from research to brand teams, cultivates relationships with key opinion leaders, and oversees publication planning and medical writing. Medical Affairs contributes to promotional review and provides market intelligence. The functions of Medical Affairs are organized globally and sometimes by business unit or therapeutic area at the local level. Key areas of specialization within Medical Affairs include medical services, medical research, and medical liaisons.