Doctors of internal medicine focus on adult medicine. They have had special study and training focusing on the prevention and treatment of adult diseases. At least three of their seven or more years of medical school and postgraduate training are dedicated to learning how to prevent, diagnose, and treat diseases affecting adults.
Internists are often referred as "Doctors for Adults." They are equipped to deal with whatever problem a patient brings—no matter how common or rare, or how simple or complex.
Internists are specially trained to solve puzzling diagnostic problems and can handle severe chronic illnesses and situations where several different illnesses may strike at the same time. They also bring to patients an understanding of wellness (disease prevention and the promotion of health), women’s health, substance abuse, mental health, as well as effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.