For ages 12+. Acetaminophen - Pain reliever/fever reducer. Dextromethorphan HBr - Cough suppressant. Guaifenesin - Expectorant. Phenylephrine HCl - Nasal decongestant. All in One (helps to relieve these symptoms day or night): Sore throat; fever; chest congestion; cough; sinus congestion; sinus pressure; nasal congestion; headache; body pain. Maximum strength per 4-hour dose. RB. Health. Hygiene. Home. www.mucinex.com. Questions? 1-866-Mucinex (1-866-682-4639). You may also report side effects to this phone number. Please visit our website www.mucinex.com. Parents: Learn about teen medicine abuse. www.stopmedicineabuse.org. Made in England.