[YEA] I have tried "ginger tea" many times successfully to heal my coughs. The coughs range from mild to severe. I cut a few slices of ginger and add to water. Then I bring it to boil and drink it when warm. Do remember to take it in the day time as there's a saying that ginger when taken in the morning is as good as ginseng but it's not good to take it during the night. I find the ginger tea especially good for coughs due to "exposure to wind".
Also, I just heard from my mum yesterday after she paid a visit to her best friend that she had used peppermint tea to cure her daughter, grandson and neighbour's long standing cough. Not even doctors' medicine could cure their cough and they have been coughing for months. After just 1 to 2 cups of peppermint tea, they are completely cured! She said to take 7 peppermint leaves and make into tea. Hope this helps.