Zedex-SF Syrup 100 ml is generally used to treat cough brought on by runny nose, sneezing, and throat discomfort. The body uses coughing, whether it is productive or dry, to remove irritants from the airways and guard against infection. Dry cough and chesty cough are the two different forms of coughs. A chesty cough (wet cough) generates mucus or sputum while being ticklish and producing no violent or thick mucus.The 100 ml bottle of Zedex-SF Cough Syrup contains two medications: dextromethorphan hydrobromide and chlorphenamine maleate. Histamine, a chemical that causes allergic reactions, is blocked by chlorphenamine maleate, which is how it functions. Dextromethorphan hydrobromide prevents neuronal impulse transmission.Disclaimer:For more information contact your physician.