would I be unfit to fly due to the presence of alcohol in my body ?
Maybe, maybe not. Just like for car driving, there is a legal limit for flying. But one doesn't want to be anywhere near there ! Ultimately depends on the amount in each cough-sweet, and how many you consume, I suppose ! For most pilots I know there is only one figure that makes sense for flying . . . . . . ZERO !
It's good you've noticed that things like cough sweets contain alcohol, and also very good that you've passed on that information for others' benefit. Thanks !
Anyone for a bit of "Gee's Linctus ?"
Oh, boy, Ginge . . . . . . . those were the days, eh ?