I was told, this method had been tested by many people. One of the best methods to stop cough.
Cut off the top part of the orange, put some salt into the orange, and put back the top part. Steam it 10 minutes and eat all the flesh including the juice at the bottom of the bowl. Doesn’t taste very good but it cures your prolonged cough in days.
Don’t forget to finish the juice left in the bowl. It tastes sour and salty, but it works.