My coughs normally respond to cures noted on this site. Currently I'm sick with a chest cold that has come with a terrible unproductive cough - was keeping me up and none of my usual tricks worked - nor did cough syrup. I thought of how drinking milk kind of coats your throat and I thought maybe it would help get rid of that urge to cough. I warmed up a cup of 3% milk with about 1 tbsp of honey (had previously tried tea & honey with no effect) and it worked fine. I drank half the cup and was able to sleep, woke up coughing later and drank the rest, then slept the rest of the night.
Even though everyone has always told me that dairy products encourage mucus production, what I have found is that very warm milk soothes my throat and stops the cough, just long enough so I can fall asleep