When cold and flu symptoms hit hard, reach for Mucinex Rapid Clear Pain, Headache & Mucus Congestion Relief. These maximum strength rapid-release caplets combine Acetaminophen to relieve pain and reduce fever with Guaifenesin to thin and loosen mucus, making it easier to breathe. Formulated for fast, powerful relief, this 20-count box helps you take control of your symptoms and get back to feeling like yourself.