Even if your college doesn’t allow it, you should NEVER take any med school pre-reqs abroad because those courses may not meet med school admission requirements/standards. And the restriction on taking major coursework at any college other than your home school is pretty much universal.
There are any number of health-care related service abroad programs for college students. They are of varying quality and none I know of are free. For fee-based programs, you’ll need to be able to pay the cost of the program, plus usually the cost of your travel (airline tickets, sometimes land transportation to the service site). Can you pay several thousand $$ for a service trip?
Have you checked to see if your faith community offers any service trips abroad? Those may be less expensive or may involve fund-raising activities to help defray your trip costs.
You should be aware that there are number of issues surrounding healthcare service trips (often referred to as voluntourism by med school adcomms) and 50% of adcomm officers have expressed “serious concerns” about these types of programs during an annual survey.
A number of adcomms have expressed ethical concerns about these programs that go beyond the potential for students to act outside their scope of training during clinical activities, including the the displacement of paid local workers by student volunteers, the diversion of critical local resources to visitors, and the encouragement of a culture of dependence.
[#instagramming Africa:The Narcissism of Global Voluntourism](https://psmag.com/economics/instagrammingafrica-narcissism-global-voluntourism-83838#.43kqx8xjd)
[7 Reasons Why Your Two Week Trip To Haiti Doesn’t Matter: Calling Bull on “Service Trips” and Voluntourism](http://almost.thedoctorschannel.com/calling-bull-on-service-trips-voluntourism/)
Not saying you can’t do a medical service trip, but be extremely cautious about which program(s) you get involved with.
If you really want to work with the medically underserved, there are areas in the US that are poorer and have less access to healthcare and other critical services (like safe drinking water, public sanitation and electricity) and than most parts of Central America or Africa. The Sioux Reservation In ND and the Navajo Reservation in NM & AZ.
Now if you want to just take coursework abroad or so some international travel--that's a different issue.
There are study abroad programs that are offered by several colleges or independent programs that are open to all students, but it's extremely unlikely your home school will allow you to use your FA to pay for classes take from an unaffiliated program. Can you pay for your travel and education expenses OOP? TANSAAFL
Probably your best option would be to delay taking your gen ed requirements and take those through an approved study abroad program affiliated with your college.