In Each 20 mL Other Information: Each 20 mL dose contains: sodium 10 mg Store between 20-25 degrees C (68-77 degrees F) Do not refrigerate. Ages 12+. New. Dextromethorphan HBR. Guaifenesin. Phenylephrine HCI. Clear nasal & chest congestion. Thins & loosens mucus. Controls cough. 1 877 99 GENOM (43666) Monday to Friday from 8 AM to 6 PM, Central time.