Klars (Ottawa, Canada) on 03/31/2007

The only thing that has ever cured my hiccups has been to take a swig of vinegar. It burns terribly all the way down but instantly that looming hiccup feeling dissipates.
For those with real trouble with hiccups, who can hold their breath until they turn blue while standing on their head drinking water only to resume hiccuping afterwards, I can't recommend the vinegar highly enough. Often I get them when I've eaten too much and drinking water or eating peanut butter seems to just make them worse. I was skeptical, but elated to discover that vinegar works.