Experience powerful multi-symptom relief with Mucinex® Fast-Max®. These caplets are specifically formulated to kick in quickly and tackle your worst cold and cough symptoms. The Maximum Strength formula combines a powerful expectorant (Guaifenesin) to thin and loosen mucus, a cough suppressant (Dextromethorphan HBr) to control your cough, a nasal decongestant (Phenylephrine HCl) to clear sinus pressure, and a pain reliever (Acetaminophen) to reduce fever and soothe sore throats. It’s a comprehensive solution for those days when you can't let a severe cold slow you down.