4-Methylmethcathinone is a synthetic stimulant with empathogenic effects that is chemically similar to methcathinone. Between 2007 and 2009, it became available for purchase online, was used increasingly in Europe, Australia, and New Zealand, associated with several deaths, and then controlled in some countries as a result. Because of the similarity in names, it is sometimes confused with 'Methedrone' (4-methoxymethcathinone) or 'Methylone' (bk-MDMA).