What Is The Best Thing To Do For A Dry

What is the best thing to do for a dry cold that is stored deep down my throat? I tried forcing a cough to spit it out but did not work, I think I end up bruising my throat and made it sore. I also tried drinking lots of fluid, cold/warm water and plenty of fruit juices also did not work. Is there any medication that I should drink to get rid of it?