Benylin mucus cough plus decongestant syrup is developed with a double action formula it helps to loosen mucus to help you create productive coughs and provides relief from nasal congestion to provide you relaxing comfort active ingredients for extra care benylin mucus cough plus decongestant syrup contains guaifenesin to help loosen chest mucus and aid in productive coughs making it easier for you to cough up pseudoephedrine to help contract the blood vessels in the nasal to relieve c