Displaying 11 results of Chlorpheniramine Impurities Chlorpheniramine is an antihistamine drug that is widely used to treat allergic conditions. However, during the manufacturing process, impurities may arise, which can affect the quality and safety of the drug. Common impurities include related compounds, solvents, and byproducts of the synthesis process. Therefore, it is important to monitor and control the levels of these impurities to ensure the purity and efficacy of the final product.