Lifitegrast Impurities are the unwanted substances that can be present in the drug substance or drug product of Lifitegrast. These impurities can arise due to various reasons such as the synthesis process, degradation, or contamination. It is important to identify and control these impurities as they can affect the safety, efficacy, and quality of the drug product. Various analytical methods are used to detect and quantify these impurities. Regulatory authorities have set limits for these impurities, and the drug product must comply with these limits to ensure patient safety.