Experience Maximum Strength Relief with Mucus Relief DM Compare to Maximum Strength Mucinex DM active ingredients. Are you struggling with cough and mucus? Say goodbye to mucus with Guaifenesin and Dextromethorphan Hydrobromide Extended-Release Tablets, 1200 mg/60 mg. This cough suppressant and expectorant helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive. 12-Hour Relief for a More Comfortable Day Don't let coughing disrupt your day. With the extended-release tablets enjoy 12-hour relief from cough due to minor throat and bronchial irritation...