Displaying 1 results of Sponimod Impurities Siponimod is a medication used to treat multiple sclerosis (MS) that works by targeting specific receptors in the brain and spinal cord. However, as with any medication, there may be impurities present. These impurities are unwanted substances that may be present in the medication and could potentially cause adverse effects or reduce the effectiveness of the treatment. It is important for manufacturers to ensure that their medication is free of impurities and safe for use.