Geri-Tussin guaifenesin syrup is an expectorant which reduces congestion and helps to aid breathing.. There are 100 milligrams of guaifenesin per 5 mL dose.. Compare to active ingredient in Robitussin – a registered trademark of Haleon.. Syrup doesn't contain any alcohol for those who prefer alcohol-free medication.. The cold and cough syrup doesn't contain sugar either.. It is nondrowsy and won't affect your daily activities.. There is 1 pint of cherry menthol flavor cough expectorant in a bottle..