TUSSIN, SYRUP COUGH 4OZ Foster & Thrive™ Tussin Guaifenesin is used to treat coughs and congestion caused by the common cold, bronchitis, and other breathing illnesses Guaifenesin is an expectorant Alcohol-Free Non-drowsy Compares to Robitussin®. Not made with natural rubber latex. Packaged: Each Robitussin is a registered trademark of Wyeth Consumer Healthcare.