Long acting, non-drowsy 12 hour relief of sinus congestion due to colds, sinusitis and allergies. Entex LA reduces nasal congestion, helps decongest sinus openings and promote nasal and/or sinus drainage. Also helps drain bronchial tubes by thinning mucus to relieve cough and relieve irritated membranes in the respiratory passageways by preventing dryness through increased mucus flow. Each sustained release tablet contains Pseudoephedrine hydrochloride 120mg and Guaifenesin 600mg.