Mebendazole is an anthelmintic drug used to treat parasitic infections. Impurities in Mebendazole may arise during the manufacturing process or storage, which may affect the purity and efficacy of the drug. These impurities can be harmful to the body and may lead to adverse effects. Therefore, it is essential to monitor and control the impurities in Mebendazole to ensure its safety and effectiveness for human use.