Maximum Strength Mucinex Fast-Max Severe Congestion & Cough is a Multi-Symptom Relief medicine for your Congestion & Cough Symptoms. Maximum Strength Mucinex Fast-Max Severe Congestion & Cough helps relieve cough, thins and loosens mucus and relieves chest and nasal congestion. Mucinex is the #1 Cough & Cold Brand Doctors Trust* and #1 Pharmacist Recommended Brand†. This product contains 6 Fluid Ounces. Use as directed, for Adults and Children 12 years of age and over.