Displaying 6 results of Rupatadine Impurities Rupatadine is an antihistamine drug used to treat allergies and allergic rhinitis. Rupatadine impurities are the by-products formed during the manufacturing of the drug. These impurities can potentially affect the quality, safety, and efficacy of the drug. Therefore, it is important to identify and control these impurities during the drug development process to ensure the final product is safe and effective for patient use.