Mucinex Fast-Max Maximum Strength Day & Night delivers dual-action relief for cold and flu symptoms around the clock. These fast-dissolving liquid gels combine acetaminophen, dextromethorphan, and phenylephrine to address congestion, cough, and body aches. The daytime formula promotes alertness while the nighttime blend supports restful sleep. With 24 count per box, you'll have convenient symptom management on hand. Maximum strength formulation works quickly to help you feel better faster during cold and flu season.