Through its active ingredients, BENYLIN® Dry Coughs helps to suppress the coughing mechanism, reducing the urge to cough. How it works: BENYLIN® Dry Coughs contains dextromethorphan which helps to suppress the cough mechanism, and helping you to feel better. What is a dry cough? A dry cough is also known as a non-productive cough because it does not produce any phlegm. Dry coughs are caused by an inflammation of the upper airways caused by dust, foreign bodies or an infection.
