"High school seniors interested in a shortened path to medical school should proceed thoughtfully.
Though most medical school candidates take the same prerequisite classes to gain entry to medical school, the paths that aspiring physicians can take through those courses vary. Some future doctors do not take a single premedical class until after they have their undergraduate degree; others complete the courses within an undergraduate science major.
For a small number of high school students, the path to medical school is very linear: They apply to both college and medical school simultaneously during their senior year. For students in the majority of these accelerated or eight-year programs, medical school acceptance after two, three or four years of undergraduate work is guaranteed, provided the students maintain the level of academic performance their school expects." …