You can learn more here: http:/??/??www.medschat.com/??wiki/??Butylscopolamine/?? The Metamizole is used as an analgesic, that can also help prevent nausea. http:/??/??www.medschat.com/??wiki/??Metamizole/?? I can not find any information that either of these is particularly harmful to the liver, however, since the Metamizole has been banned in the U.S. my available information is limited.