Maximum Strength Mucinex Fast-Max Cold & Flu is a Multi-Symptom Relief medicine for your Cold & Flu Symptoms. Maximum Strength Mucinex Fast-Max Cold & Flu All In One helps reduce fever and relieve cough, sore throat, stuffy nose, chest & nasal congestion, headache and minor aches and pains. MAXIMUM STRENGTH RELIEF: Maximum Strength Mucinex Fast-Max Cold & Flu All In One helps reduce fever and relieve cough, sore throat, stuffy nose, chest & nasal congestion, headache and minor aches and pains.