Lumiracoxib is a nonsteroidal anti-inflammatory drug that is used to treat pain and inflammation. Lumiracoxib impurities refer to the byproducts or contaminants that may be present in the drug substance or its intermediates during the manufacturing process. These impurities may have potential health hazards and hence need to be carefully monitored and controlled to ensure the safety and efficacy of the drug. Various analytical techniques are employed to detect and quantify these impurities.