Complete the required science coursework. Many registered nursing programs don't require a full year of chemistry or biology with a lab component -- instead they only require a semester -- and most don't require any physics coursework. Medical schools require one year of chemistry with laboratory, one year of organic chemistry with a lab, one year of biology with a lab and one year of physics with a lab. You will need to take any additional science components at a local college before applying to medical school.
Complete additional science coursework to help prepare you for the Medical College Admissions Test, or MCAT. UC Davis Medical School recommends that you complete a semester (or quarter) of human physiology, genetics and biochemistry. Many registered nursing students will have completed a human physiology course, and have the option of completing a biochemistry course to fulfill their science requirement. Take an additional genetics course, or any other recommended coursework, at a local college.
Complete the required math coursework. Registered nursing degree programs require statistics. Many medical schools, although not all, require one year of calculus. Check with your medical school of interest to see if you have satisfied the math requirement.
Complete the English and humanities requirement. Most medical schools require one year of English; one semester should concentrate on expository writing. Some registered nursing programs only require one semester of English. Go to a local college and complete the additional semester of English, if necessary. Also, many medical schools require the completion of humanities coursework, which can include humanities, psychology, sociology, anthropology and ethics; many registered nurses will have some humanities coursework already completed. Harvard Medical School requires 16 hours of humanities coursework. UC Davis Medical School, on the other hand, doesn't require candidates to complete a humanities course.
Take the MCAT. Most medical schools in the U.S. require that you submit your MCAT scores. The MCAT is a standardized, mostly multiple-choice test that examines your writing, critical thinking, problem solving and science knowledge. It is also designed to assess your medical aptitude. The MCAT has four components: verbal reasoning, biological sciences, physical sciences and a writing sample. You must sign up for the MCAT (see Resources).