4-Methylethcathinone or 4-MEC is a chemical that bears a chemical resemblance to mephedrone.Due to its similarity to mephedrone, it is thought to be a stimulant and entactogen drug of the phenethylamine, amphetamine, and cathinone chemical classes. 4-MEC is a synthetic stimulant with empathogenic effects that is chemically similar to methcathinone. It became available online in 2010. It has been sold as replacement for 4-methylmethcathinone (mephedrone) and has appeared in some samples of “NRG-2”. It has an extremely short history of human use. It has been marketed alone or in mixtures with other substituted cathinones under the name “NRG-2”, although other blends such as “NRG-1” may have been more ambiguous with their ingredients.