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