

Lots of pill-shaped medicine already does. You’re supposed to swallow them immediately, if you don’t you often find that they are mixed with bittering agents (or just naturally taste bitter).
Where I live, cough syrup that might actually be dangerous (e.g. the purple drank stuff) is already prescription-only or fully illegal, anyway.


That kinda requires intention and effort, you wouldn’t be doing it because the process is so enjoyable. I definitely remember syrup medicine being really tasty when I was a kid.