For MEDICINE you need to major in Science.
Few of the most important classes to take are:
Biology 141 - Anatomy of The Body
Biology 142- Physiology of the Body
Microbiology Advanced classes from 150 up to 250.
English more than 8 Credits if you are native. If you are not the may need a test is called the TOEFL test.
This where the once I took before I became a DENTIST ( DDS). In your case, I do recommend to set an appointment with an adviser from the school that you want to enter. They will be more specific, this way you don't waste your money nad your time.