Displaying 2 results of Fexuprazan Impurities Fexuprazan impurities are foreign substances that can be found in samples of Fexuprazan, a drug used to treat acid-related disorders such as gastroesophageal reflux disease. These impurities can affect the purity and potency of the drug and may cause adverse effects on patients. Therefore, it is important to identify and control these impurities during the drug development process.