Displaying 20 results of Parecoxib Impurities Parecoxib is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and inflammation. However, during its production, various impurities may be formed that can compromise its quality and safety. These impurities may include degradation products, isomers, and residual solvents. Therefore, proper identification, quantification, and control of these impurities are essential to ensure the efficacy and safety of Parecoxib.