Guaifenesin is an expectorant that helps to thin and loosen mucus in the lungs, making it easier to cough up the mucus.

Comment: It has helped me to cough up the mucus which collects in my bronchial tubes.

Use an expectorant if you have a cough that produces thick mucus and you are having difficulty coughing up the mucus.

Expectorants may keep mucus from sticking to the airways of the lungs, making it easier to cough the mucus up.

This is intended to make it easier for the sufferer to cough the mucus up during physiotherapy.

The expectorant helps thin and loosen mucus in the lungs, making it easier to cough up the mucus.

Can't say I'm enjoying the state of affairs much, and I'm still coughing up the black mucus.