Brivudine impurities are the residual substances or by-products that may be present in brivudine medication during the manufacturing process. These impurities may affect the safety and efficacy of the drug. The identification and quantification of brivudine impurities are crucial to ensure the quality of the medication. The development of effective methods for the detection and removal of brivudine impurities is necessary to ensure the purity and safety of the drug.