Robitussin Chesty Cough loosens and helpsclear chestcongestion � Provides symptomatic relief from congested chests and coughs due to the common cold. Robitussin liquid coats and soothes the throat. � Contains the expectorant Guaifenesin, which increases the flow of natural secretions along the lower respiratory tract. This liquefying effect helps break up a cough - helps loosen congestion so you can cough it up and get it off your chest View more