Get powerful relief from heavy chest congestion and persistent coughing with Max Tussin SR. This formula contains a high-strength combination of Guaifenesin (200 mg) and Dextromethorphan HBr (20 mg) per 10 mL dose. The Guaifenesin acts as a potent expectorant that thins and loosens mucus in the chest, making coughs more productive. Meanwhile, the Dextromethorphan serves as a cough suppressant to control the impulse to cough for up to several hours. Together, they provide a dual-action approach to tackle severe cold symptoms. This liquid formula is non-drowsy, making it suitable for daytime use when you need to stay alert while managing your recovery.