Rilmenidine is a medication used to treat high blood pressure. However, during the manufacturing process, impurities may be produced that can affect the purity, safety, and efficacy of the drug. These impurities may include byproducts, degradation products, and residual solvents. Therefore, it is important to monitor and control the levels of these impurities to ensure the quality and safety of the drug. Analytical methods such as chromatography and spectroscopy are commonly used to detect and quantify these impurities.