Displaying 16 results of Nadolol Impurities Nadolol is a beta-blocker medication used to treat high blood pressure and angina. Nadolol impurities refer to any substances present in the medication that are not the active ingredient. These impurities can affect the safety and efficacy of the medication, and must be monitored and controlled during manufacturing and storage. Common nadolol impurities include related compounds, degradation products, and residual solvents.