Mucinex® Sinus-Max® Pressure & Pain Caplets. Read new information. Maximum strength*. Acetaminophen - pain reliever. Guaifenesin - expectorant. Phenylephrine HCl - nasal decongestant. Relieves sinus pressure & congestion. Relieves headache. Thins & loosens mucus. For ages 12+. *Per 4-hour dose. Uses: Temporarily relieves: Nasal congestion. Headache. Minor aches and pains. Sinus congestion and pressure. Temporarily promotes nasal and/or sinus drainage. Helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive. Questions 1-866-MUCINEX (1-866-682-4639). You may also report side effects to this phone number. www.mucinex.com. ©2016 RB.