Donepezil Impurities refer to any foreign substance or chemical compound that is present in Donepezil, a medication used to treat Alzheimer's disease. These impurities may affect the efficacy or safety of the drug, and therefore it is important to monitor their levels and limit their presence to ensure the highest quality of the medication. Analyzing and controlling Donepezil Impurities is crucial for the pharmaceutical industry and healthcare professionals to provide safe and effective treatments for patients.