Dosulepin impurities refer to the unwanted substances that may be present in dosulepin drug formulations. These impurities may arise during the manufacturing process or storage of the drug, and they can affect the safety, efficacy, and quality of the medication. It is essential to identify and quantify these impurities to ensure that the drug is safe for consumption. The presence of dosulepin impurities can lead to adverse effects on patients, and therefore, their control is critical.