Welcome to the forums
. This question comes up with some regularity, so that if you do a search on it, you'll turn up lots of info. There are some search tools in the blue tool bar near the page top, & if you click on search, a variety of choices of search type(s) will appear.
As to your question, most folks tend to get their MD to write prescriptions for them to be filled in quantities of 3 months. Along with many getting their refills mailed/shipped to them when 3 months is up. That, or they simply consult with a local MD during their travels. Health care
tending to be much less expensive outside of the US. And this is assuming that the meds that you need can't simply be purchased locally, over the counter. Since in lots of places the rules aren't so strict.
Oh, & you can also get a letter from your doctor stating what you're taking & why to carry with you. To include both the trade
names for the meds, & their generic name.