For the last few years I have noticed that often the cough associated with the average cold or flu lasts for several weeks. I recently learned that Thyme tea is a wonderful, natural remedy to heal from persistent coughs. You can look it up in reliable places such as the People’s Pharmacy:
Here is one recipe that has worked well for many: http://www.stepin2mygreenworld.com/healthyliving/cough-buster-thyme-tea/
You can vary the ingredients (except for Thyme, of course) to adjust to your taste. For example, some folks can tolerate the spiciness of Cayenne a lot better than others.