Displaying 25 results of Clarithromycin Impurities Clarithromycin impurities are unwanted substances that may be present in clarithromycin drug products. These impurities can arise during the manufacturing process, storage or transportation of the drug. Some of the common impurities include related compounds, degradation products, and residual solvents. The presence of impurities can impact the safety and efficacy of the drug, and therefore, regulatory bodies impose strict limits on their levels in drug products.