Verapamil is a medication used to treat high blood pressure, angina, and heart arrhythmias. Verapamil impurities refer to any substances that are present in the medication that are not the active pharmaceutical ingredient. These impurities can affect the quality, safety, and efficacy of the medication and must be controlled and monitored during the manufacturing process. The identification and quantification of verapamil impurities are important for ensuring the purity and stability of the medication.