The robitussin I bought has no initials, but it does contain a cough suppressant as well as the expectorant (which thins mucous). I will keep my eye out for some that has only the expectorant just to be safe
I've thought about the green tea thing as well, however I just hate tea! Tea of all kinds! Tea is one of those acquired tastes along with coffee that I just never learned to like
Thanks for your advice it helped me a lot!