When I went to Mexico almost a decade ago to do some missionary work, my doctor gave my dad and I each a full round of antibiotics with instructions to start taking them immediately if we started feeling sick.
Overuse of antibiotics is a global problem, for sure, but once you get into thelower latitudes of the planet, infections get a hell of a lot more dangerous. more bacteria, more types, and they move fast.
Most people spending significant time in thetropics learneventually that small infections or even just cuts you would ignoreup north require mich more caution, attention, and respect if you want to stay out of the hospital, or, you know, just not die.
Keeping some antibiotics on hand isn't a terrible idea when there's a scenario that delays medical care for more than a day (and no, the weekend doesn't count in a city).