Many people who hear about this dismiss it as an old wives' tale. Until they actually try it. It really works.
Chop up an onion, put in glass a jar, add liquid honey cover, seal and let stand at room temperature at least 24 hours. Use the syrup that forms as a cough remedy as needed, a teaspoon at a time. The taste is not great but medicine does not have to taste good.
Polonius3, I have heard of this remedy, but I have never tried it. Have you ever used it yourself? Does it have to be refrigerated or can it be kept at room temperature?