Capecitabine is an oral chemotherapy medication used to treat a variety of cancers. However, during the manufacturing process, impurities may be introduced into the drug, which can affect its purity and potency. These impurities must be identified and characterized to ensure the safety and efficacy of the drug. The most common impurities found in Capecitabine include degradation products, related substances, and residual solvents. Detection and quantification of these impurities require advanced analytical techniques such as high-performance liquid chromatography (HPLC) and mass spectrometry (MS).