A student in their mid-30's would not have been NEAR the oldest in my first-year medical school class... however, if you still have to get through undergrad and get IN to medical school, you are probably looking being 40 or so when you begin.
A 40-y.o. still wouldn't have been the oldest person in my class, though -- we had a student who was 50.
Make REALLY sure that you know EXACTLY what you are doing, and that you are up to it, however. It's a hard friggin' slog.
Good luck!
