Ethylone, also known as 3,4-methylenedioxy-N-ethylcathinone (MDEC, βk-MDEA), is a recreational designer drug classified as an entactogen, stimulant, and psychedelic of the phenethylamine, amphetamine, and cathinone chemical classes.

Ethylone has only a short history of human use and is reported to be less potent than its relative methylone.

[citation needed] In the United States, it began to be found in cathinone products in late 2011.

[3] Analysis of human and rat urine for the metabolites of bk-amphetamines suggested that ethylone was degraded in the following metabolic steps:[4] As of October 2015 Ethylone is a controlled substance in China.

[5] This drug article relating to the nervous system is a stub.