Always safest to ask the country in question, as what one country considers to be in that category another may not. For example, here in Canada one can actually buy Tylenol 1 (or its generic), which has codeine, as an OTC med - it is sold "behind the counter". In the US one needs an Rx. The US will allow a Canadian resident visiting the US to bring in a very limited supply of Canadian OTC Tylenol 1 for personal use, but there are limits one needs to be aware of [which the US government helpfuly discusses on their website].
And some countries have some interesitng meds laws. For example, unless they have changed the law recently, among other rules, Japan restricts the import of injectible meds and syringes even if you have a legit Rx -- you have to get advance permission. Even something like an Epipen, where it is extemely clear exactly what it is since it is an all-in-one-preloaded-device, is covered under it.
Good luck !!
SW