Fenfluramine is an appetite suppressant drug that was once used to treat obesity. However, it was withdrawn from the market due to its association with serious side effects, including heart valve damage and pulmonary hypertension. Fenfluramine impurities refer to any unwanted substances or contaminants that may be present in fenfluramine products, which can have negative impacts on the drug's efficacy and safety. The presence of impurities can also lead to regulatory issues and product recalls. Therefore, it is
