Rugby Mucus Relief Dextromethorphan 30mg Extended Release Tablets are a dual-action, 12-hour medication combining Dextromethorphan (a cough suppressant) and Guaifenesin (an expectorant) to relieve chest congestion and cough by thinning mucus and reducing the cough reflex, without causing drowsiness, and are for adults and children 12+. You swallow tablets whole with water, taking 1-2 tablets every 12 hours, not exceeding 4 daily, to help loosen phlegm and quiet bothersome coughs from colds or irritants.