How will Tessalon Perles help my cough?

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Why: I am taking them 3 times a day for a rumbly cough/cold/Black Lung. My chest sounds like it has Bingo balls tumbling around in it.

Answer: It works by reducing the reflex in the lungs that causes the urge to cough. It has an anesthetic (numbing) action similar to that of benzocaine and "numbs" the stretch sensors in the lungs. It is the stretching of these sensors with breathing that causes the cough.

Source: WebMD, MedicineNet

The More You Know: My voice is completely gone. I have not been able to speak for 2 days. No calls, please.