Other Information: Store at 20-25 degrees C (68-77 degrees F). For ages 12+. Acetaminophen - Pain reliever. Guaifenesin - Expectorant. Phenylephrine HCI - Nasal decongestant. Clears sinus congestion. Relieves headache. Thins & loosens mucus. Health. Hygiene. Home. www.mucinex.com. Questions? 1-866-MUCINEX (1-866-682-4639). You may also report side effects to this phone number. Made in England.