Lamotrigine is commonly used as an anticonvulsant, but it is important to ensure the purity of the drug to avoid any negative side effects. Lamotrigine impurities refer to any unwanted substances or chemicals that may be present in the drug. These impurities can affect the stability, efficacy, and safety of the drug, making it essential to monitor and control their levels. Accurate identification and quantification of these impurities can help ensure the quality and purity of the drug, reducing the risk of adverse effects.