Dunno if it's an allergy or a localised sensitivity or what (allergy clinic didn't seem clear, just said keep away from it) but I can't drink anything with alcohol at all or it will make my lips swell up hugely and painfully, like one of those gone-wrong trout pout things. Came on in my late 20s, was fine before, not a heavy drinker though so no obvious reason to trigger it. Bummer, frankly. Console myself with Bailey's flavour syrup in lattes etc, but not really the same thing :-(