Displaying 6 results of Levodopa Impurities Levodopa is a medication commonly used to treat Parkinson's disease. However, during its production, impurities can be formed which may affect the quality, safety, and efficacy of the drug. These impurities can also cause adverse side effects such as nausea, vomiting, and heart palpitations. Therefore, it is important to monitor the levels of levodopa impurities and ensure that they are within acceptable limits.