Lafutidine is a medication used to treat gastrointestinal disorders such as gastritis and peptic ulcers. However, during the manufacturing process, impurities may be introduced into the final product. These impurities can potentially affect the safety and efficacy of the medication. Therefore, it is important to identify and control these impurities to ensure the quality of the drug product. Common impurities found in Lafutidine include related substances and residual solvents. Analytical methods such as HPLC and GC are used to detect and quantify these impurities.