Displaying 1 results of Gramicidin Impurities Gramicidin is a polypeptide antibiotic that is commonly used in the pharmaceutical industry. However, during the production process, impurities can be introduced. These impurities can have negative effects on the quality and safety of the final product. It is important to closely monitor and control the levels of gramiciidin impurities to ensure the effectiveness of the antibiotic and prevent any potential harm to patients.