Can liquid robitussin (guaifenesin) original help with a heavy feeling in chest from a cold?

Yes?: It really depends on what you are referring to - the "original is usually robitussing dm and can help with chest congestion. Recently Robitussin (guaifenesin) changed the names on many of their meds to specify which symptoms and thus making it easier to choose which one is right for you. Also it often will show on the box- which symptoms it can treat-hope this helps.