Displaying 9 results of Nortriptyline Impurities Nortriptyline is a tricyclic antidepressant medication used to treat depression and other mental health conditions. However, during the manufacturing process, impurities may be produced which can affect the purity and potency of the final product. These impurities can include related compounds, degradation products, and residual solvents. It is important to monitor and control these impurities to ensure the safety and efficacy of the medication.