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A cough is triggered once irritation builds up to a certain level. Reducing irritation in your throat and airway will reduce coughing.
The most important thing you can do is to drink plenty of water to reduce dryness of your throat. Drink at least 1 and a half litres of water each day, that is about 6-8 glasses of water. Not including tea, coffee or soft drinks as they usually contain caffeine.