Guaifenesinpseudoephedrine hydrochlorideliquid for oral administrationloosens chesty coughsclears blocked nose and sinusessymptoms of a chesty cough with congestionproductive thick and sticky mucus or phlegmtightness in the chestblocked nose andor sinuseshow robitussin worksloosens and thins mucus or phlegm making it easier to cough uprelieves nasal and sinus congestionsoothes the chest area