Dextromethorphan Hydrobromide Guaifenesin (Mucotuss) 10mg/50mg/5ml Syrup 120ml is a combination syrup used to relieve cough and chest congestion. Dextromethorphan helps suppress coughing, while Guaifenesin loosens mucus for easier removal. This effective formulation provides relief from both dry and productive coughs, and comes in a 120ml bottle.