Voglibose is an alpha-glucosidase inhibitor used to treat diabetes. However, like all drugs, it may contain impurities that can affect its safety and efficacy. Voglibose impurities may include related compounds, residual solvents, and degradation products. These impurities must be monitored and controlled to ensure the quality of the drug product. Analytical methods are used to detect and quantify impurities, and limits are set to ensure the safety and efficacy of the drug.