Sorry for bumping, but please save yourself and do NOT take Latin just because you think it will be useful for med school. I took
four years of it (mandatory), and it is not fun and it is not easy. Are there people who love it? Sure! Will you be one of them? Probably not! Unless you want to minor in Classics or read old medical books in the original, don't bother. I've also been told that to someone who's taken Latin, Spanish grammar seems really broken. And
here's some docs talking about why it's a bad idea.
I'm not saying take Spanish
per se, though. It's the dumping ground for people who don't really want to learn a foreign language and pick it because it's easy, and I would imagine it doesn't look quite as good on an application because it
is considered the "easy" language. I would recommend German, if it's available. (If not, then definitely go with Spanish.) It's complicated enough for you to be challenged but not as hard as Latin, also has possible medical applications, and is one of the most widely spoken languages in Europe, and I think--based on what my teachers have said--that it does look better. Obviously you want to learn Spanish eventually, but
ahora (now) is not necessarily the time. (Am I biased...yes...sorry.)
Good luck making a choice, and if you do choose Latin (or German) and need some help with the beginning stuff, feel free to PM me.