Displaying 15 results of Metamizole Impurities Metamizole is an analgesic and antipyretic drug used to treat mild to moderate pain and fever. However, during the manufacturing process, impurities may be introduced into the drug product. These impurities can be harmful and may cause adverse effects in patients. Therefore, it is crucial to monitor and control the levels of impurities in Metamizole to ensure its safety and efficacy. Some of the impurities that may be present in Metamizole include 4-Aminophenazone, N,N-Dimethylaminophenazone, and N,N-Dimethyl-4-aminoazobenzene.