Dunno how I missed this thread in Real Time...
I love cranberry ( or anything sour) but I have also had success with a bunch of fresh parsley (flat leaf but I imagine curly would be fine too ) simmered in a quart of water for 15 min. Drink when it has cooled (obviously) as quickly as possible (if not all at once).
It also works with nettle tea (but you have to use fresh nettles).
Both of these taken at the very first sign. Which you get good a recognising after a few bouts as we all know.
All you need is love...la-dee-da-dee-da...all you need is love!