If expectorant moves the mucous out through cough then how will it provide relief in cough. And many syrups have both cough suppressant and expectorant. Do they not cancel out each other effect as expectorant will produce more cough and cough suppressant reduce cough.

Dr. Aakash PalGeneral Physician2yrs exp

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Expectorants are of two types: mucolytics: which thin out tenacious mucoid secretions in the airways mucokinetics or “expectorants”: they help the clearance of mucus by making coughing easier both should not be prescribed in dry cough as they are known to aggravate cough. However, wet cough is due to the secretions in the airways and should never be suppressed. Mucokinetics are used in this case which makes coughing easier. Mucokinetics are not combined with antitussives. However mucolytics can be combined, however efficy is questionable.  

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