Displaying 6 results of Colesevelam Impurities Colesevelam is a bile acid sequestrant drug used to lower cholesterol levels in the blood. Like all drugs, it may contain impurities, which are unwanted substances that can affect the quality and safety of the drug. These impurities can be generated during the manufacturing process, storage, or transportation of the drug. Colesevelam impurities can include residual solvents, degradation products, and other impurities that may interfere with the drug's efficacy and safety. Proper quality control measures must be in place to ensure that the drug is free of harmful impurities.