Power through cold and flu symptoms with Mucinex Rapid Clear Pain, Headache & Cough Relief Liquid Gels. These maximum strength, rapid-release capsules combine Acetaminophen for pain and fever relief with Dextromethorphan HBr to suppress coughs fast. Designed for adults and children ages 12 and up, Mucinex liquid gels work quickly to ease discomfort, reduce fever, and control coughing—so you can breathe easier and feel better sooner.