Here's the status quo for pre-reqs:
- Chem I&II (w/labs)
- Orgo I&II (w/labs)
- Physics I&II (w/labs)
- Bio I&II (w/labs)
- Calc I & either Calc II or Stats (take calc II to be on the safe side, though I recommend taking both)
- 2 writing courses (1 of which can be a science course that is writing-heavy)
- 2 social science courses
- 2 humanities courses
Here are a couple courses that are currently recommended by many med schools, though I suspect they'll be a requirement by the time you're ready to apply:
- Biochem (at least a survey course)
- Genetics
Finally, here are a few courses that I personally recommend so they're not completely foreign to you when you hit med school:
- Anatomy and/or histology
- Physiology
- Immunology