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However, if your cough persists or worsens, you should seek medical help. 1  Drink plenty of water. 2  Suck on cough lozenges or hard candies. 3  Drink herbal tea, or lemon juice and hot water, with a spoonful of honey mixed in.  Chew on a piece of ginger with salt sprinkled on 1  it. Gargle with a mixture of water and salt.