MUCINEX Nightshift Sinus Relieves Headache, Fever, Body Pain, Sore Throat, Coughing, Sneezing, Runny Nose, and Nasal Congestion. ACTIVE INGREDIENTS (in each 20 mL) MUCINEX Nightshift Sinus: Acetaminophen 650 mg Purpose(s) Pain reliever/fever reducer Dextromethorphan HBr 20 mg Purpose(s) Cough suppressant Phenylephrine HCl 10 mg - Nasal decongestant Triprolidine HCl 2.5 mg Purpose(s) Antihistamine. USAGE INFORMATION Adults and children 12 years and older Liquid 20 mL (in dosing cup provided) every 4 hours No more than 6 doses in any 24-hour period Children under 12 years DO NOT USE.
