Displaying 3 results of Sotalol Impurities Sotalol is a medication used to treat heart arrhythmias. It is important for pharmaceutical companies to ensure that the drug is pure and free from impurities. Sotalol impurities can cause unwanted side effects, decrease drug efficacy, and even be toxic to patients. Therefore, strict quality control measures are implemented during the manufacturing process to ensure that Sotalol is of the highest quality and purity.