Amitriptyline is a tricyclic antidepressant used to treat depression, anxiety, and chronic pain. However, during the manufacturing process, impurities may be formed, which can be harmful to human health. These impurities can include N-methylamitriptyline, N,N-dimethylamitriptyline, and other related compounds. It is important to monitor and control the levels of these impurities to ensure the safety and efficacy of the final product.
