Just to add a slightly dissenting opinion, I do think that there are extremely specific situations in which a Caribbean medical school would be a reasonable choice. For example, if you had academic qualifications that indicated you could succeed in medical school (like a 32+ MCAT and a good GPA) but had something on your record that would make it impossible for you to ever get into a real medical school (i.e. getting kicked out of college for cheating or something like that). In that situation, I don't think it would be unreasonable to suggest that you would be amongst the students who are capable of getting past the academic barriers of medical school and can pass Step 1, thus giving you a somewhat viable path to becoming a doctor. Of course, it would still be a considerable financial risk and at that point I would probably advise just picking a different career.
The problem with that is that if a residency program asks why you went to a Caribbean school instead of staying in the U.S. then you're in an ethical dilemma. Assuming you're honest and ethically moral you're going to have to tell them you messed up bad enough in undergrad that you basically got blacklisted in the U.S. You can hope that residencies will give you the benefit of the doubt and look past it, but it's very likely that some won't.
As I have said many times, a decade or more ago, the Caribbean was a reasonable path for a student to become a physician. However, since both MD and DO schools have grown both in number and size, producing 30% more graduates in a decade ending in 2019, with an even larger increase in the size of the overall applicant pool, but yet virtually no growth in the number of residency slots, it reduces opportunity for IMGs to obtain any residency slot upon graduation. Thus as an advisor, it is difficult to recommend to a student to go these schools, risking huge debt and smaller chances for residency, thus practicing medicine, without exhausting all the possibilities for a US medical school education. As I've said often, before considering any offshore school applicant must go through at least two application cycles for both MD and DO with at least a year break in between (ie skip a cycle) for application repair and/or enhancement. the break is necessary to analyze and understand the weaknesses in an application. Repair may be as simple as reorganizing rewriting application or it may require postbacc, SMP, MCAT, or additional extracurricular such as clinical volunteering and other items. I strongly advise that no student should consider off shore schools until the above has been done.
I'd add some caveats to the reason for applying to Carib schools.
1) You need to be willing to take on a lot of debt or have enough saved up that you wouldn't be screwed if med school falls through. It's a high risk choice, applicants should understand that before making it.
2) You're essentially limiting yourself to the non-competitive fields unless you're a stud. Then you've got a shot at the moderately competitive fields like EM or gas. Sure, there's those one or two guys that match neurosurg or ortho, but just to match those fields you'd have to have stats and an application that would make a US MD competitive to match at an elite residency like MGH.
3) Understand that with a mediocre CV or even an okay one, you may never get into a U.S. residency program. So if you're okay with practicing abroad, then it's not as big of an issue. If you've got your heart set on coming back to the U.S./staying in the U.S., you may want to reconsider.
4) There's a very good chance you'll be there more than 4 years. It's fairly common for people that attend Carib schools to take a semester or year off to study for boards. I've also talked to people that weren't able to finish their clinicals in 2 years and had to take an extra semester to finish them. If you go Carib, be prepared to potentially be in med school 5-6 years.
5) Understand that your curriculum may not be up to par with your US counterparts. This might not be true for every med school, but I've heard friends that have run into Carib students on rotations say their knowledge base seemed lacking. From what people have said on here a lot of Caribbean rotation sites are pretty lacking in quality. Idk how true that is, but it's a common theme I've seen on here.
As an aside, why these students choose risky off shore schools over podiatry is something I should examine.
I've heard 2 reasons. The first is that they don't don't want to limit themselves to just working on feet. Considering matching FM or low-tier IM is very realistic for Carib grads assuming they make it to the match and apply broadly, I don't think it's a terrible choice there. The other reason is that a lot of people don't think podiatrists are real doctors and look down on them. It's the same reason some people would rather go to a Carib MD than a DO school, because prestige matters more to them than their actual career.