What is Benylin Mucus Cough Plus Decongestant Syrup?Benylin Mucus Cough Plus Decongestant Syrup can loosens stubborn mucus in the chest reduces catarrh and soothes blocked sinuses, to help you clear a chesty cough. The non-drowsy syrup lets you get on with your day. Key features of Benylin Mucus Cough Plus Decongestant Syrup Guaifenesin thins and loosens mucus Pseudoephedrine reduces congestion Gets rid of excess mucus Soothing effect Pr s deep penetrating relief. Please note that results may vary.