>>2424166It's worth looking into getting vaxxed for yellow fever, and getting an antimalarial. If you're in a pinch, there's a pharmacy on every corner in Colombia, so you'll be able to pick something generic up at cost.
Colombian border areas are sketchy due to drug trafficking. If you're gonna be exploring the countryside go with an established tour company or something, DO NOT just go wandering off.
It sounds counterintuitive, but cocaine is actually heavily imported to Colombia from Peru, so that it can be refined and smuggled upwards into America.
Watch out if you're going to a bar, especially alone or in the company of other foreigners. Scopolamine may be put in your drink, or a sketchy guy can shake your hand to dose you with it. They can even blow it in your face. They're so desperate in Colombia these days they're even doing it to locals, better watch out.