Displaying 4 results of Pyrantel Impurities Pyrantel is an anthelmintic drug used to treat parasitic worm infections in animals and humans. However, during the manufacturing process of pyrantel, impurities can be generated. These impurities may pose a threat to the safety and efficacy of the drug. Therefore, it is essential to understand and control the impurities generated during the pyrantel manufacturing process to ensure the quality of the drug product.