Apparently, studies have shown that cough medicine is ineffective in children, and in some cases harmful. I'm sure that those cases would be the self-medicating kind. I remember when my brother self-medicated with a red-coloured cough mixture which he referred to as "red Coke".
Hang on … that was box wine, it wasn't cough mixture …
I digress. I think it's a good thing to give children alcohol. It helps them sleep better, and if you're that kind of person, it's also a good marinade.