Benzonatate

Benzonatate or 2,5,8,11,14,17,20,23,26-nonaoxaoctacosan-28-yl para-butylaminobenzoate is a non-narcotic oral antitussive drug which works by anaesthetizing the tissues of the lungs and pleura responsible for the cough reflex. It is chemically related to other ester anaesthetics such as procaine. According to the Medicine.net article, it has an anaesthetic (numbing) action similar to that of benzocaine and "numbs" the stretch sensors in the lungs, and it is the stretching of these sensors with breathing that causes the cough. It's not related to opioids or dextromethorphan. Brand name Tessalon Perles.

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