Major Robafen DM - Cough and Chest Congestion Suppressant and Expectorant Dextromethorphan 20 mgGuaifenesin 200 mg Raspberry Flavor Cough Syrup - 8 fl oz. Temporarily relieves cough due to mild throat and bronchial irritation as can occur with a cold. Helps loosen phlegm (mucus) and thin bronchial secretions to drain the bronchi.