Acarbose is a medication used to treat type 2 diabetes by slowing down the digestion of carbohydrates in the body. However, it may contain impurities that can affect its efficacy and safety. Acarbose impurities are unwanted substances that can be present in the medication due to various reasons, such as improper synthesis, storage, or handling. These impurities can have adverse effects on the patient's health and must be closely monitored and controlled to ensure the quality and effectiveness of the medication.