Benylin Mucus Cough plus Decongestant Syrup 100ml [P] Benylin Mucus Cough Plus Decongestant Syrup to loosen mucus & clear chesty coughs. Benylin Mucus Cough Plus Decongestant Syrup also relieves: Nasal congestion Catarrh Blocked sinuses Non- Drowsy Formulation