Guaifenesin: an expectorant that loosens and thins excess ... adding that "it does appear to thin mucus." Let's start at the ...

According to the Mucinex’s website, its expectorant “clears the airways ... the active ingredient in Mucinex—will thin ...

What is the best medicine to break up phlegm? Guaifenesin, like Mucinex, helps clear mucus from your chest. It's a type of drug called expectorants, which thin the mucus and make it easier to ...