Displaying 2 results of Benzonatate Impurities Benzonatate is a medication used to treat cough. It is a synthetic compound that acts as an anesthetic on the respiratory stretch receptors, preventing cough reflex. Benzonatate impurities refer to any unwanted substances that may be present in the medication, either as byproducts of the manufacturing process or as contaminants. The presence of these impurities can affect the efficacy and safety of the medication, so it is important to monitor and control their levels. Analytical methods such as high-performance liquid chromatography (HPLC) are used to detect and quantify these impurities.