Levalbuterol is a bronchodilator medication used to treat respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD). However, like any medication, levalbuterol may have impurities that can affect its efficacy and safety. These impurities can be the result of the manufacturing process, storage, or degradation over time. It is important to monitor and control these impurities to ensure the quality and safety of the medication. Regulatory agencies such as the FDA have established guidelines for acceptable levels of impurities in levalbuterol and other medications.