Displaying 8 results of Primaquine Impurities Primaquine impurities are unwanted substances that may be present in primaquine drug products. These impurities can have negative effects on the efficacy and safety of the drug. It is important to identify and monitor these impurities to ensure the quality and purity of the drug product. Primaquine impurities may include degradation products, by-products, and other impurities that are formed during the manufacturing process or during storage.