Cetirizine impurities are unwanted substances that may be present in cetirizine formulations. These impurities can be generated during the manufacturing process or may be present as contaminants in raw materials used for the production of cetirizine. Impurities in cetirizine may affect the efficacy, safety, and stability of the drug product. Therefore, it is essential to monitor, identify, and control cetirizine impurities to ensure the quality of the drug.