Nefopam impurities are unwanted substances that may be present in Nefopam drug formulations. These impurities can arise from various sources such as the manufacturing process, storage conditions or degradation of the drug over time. It is important to identify and quantify these impurities as they can affect the safety and efficacy of the drug. Accurate identification and quantification of Nefopam impurities is essential to ensure the quality and purity of the drug.