Carbovir is a potent antiviral drug used for the treatment of HIV and AIDS. However, the drug is not completely pure and may contain impurities that can affect its efficacy and safety. Carbovir impurities refer to any unwanted substances that may be present in the drug, such as residual solvents, degradation products, or other contaminants. It is essential to monitor and control the levels of these impurities to ensure the quality and purity of the drug, as well as to minimize any potential side effects or adverse reactions.