How funny; I'm a real skeptic about home remedies, but ended up browsing your site after doing a search for cough cures.
Of course I didn't believe all these folks' claims that apple cider vinegar and honey helped their cough, but, well, since I've had this persistent cough for almost two months, I figured I'd give it a try.
Like another poster here, I only had regular white vinegar, so I used that (about 2/3 cup) and some honey (a big tablespoonful)...and was, predictably, quite surprised that it really did help! That uncontrollable cough reflex has gone and even the congestion in my nose cleared up. Pretty cool!
I'll be using this remedy (especially since I'm a freak and I actually do like the taste of vinegar and honey!) until I kick this cough completely.