Tylenol or some form of medicine. I know people that bring that to give out when going to South East Asia.
That's something I definitely wouldn't do.
Carrying big amounts of medicine will get you in serious trouble with the local customs and maybe even the police.
You'd need to do some serious research prior to that to chek if they are legal and how much you can carry or if you need to declare them.
That's something you're allowed to do.
I've witness this done countless times or else I wouldn't have suggested it. My friend's mom brought a suitcase full of Tylenol down there and she had no problem passing through. Unless it's a ton of liquid meds or unlabeled meds, but almost anything retail package no matter the amount you want to bring is acceptable.