Eutylone (also known as β-keto-1,3-benzodioxolyl-N-ethylbutanamine, bk-EBDB, and N-ethylbutylone) is a stimulant and empathogenic drug of the phenethylamine, amphetamine, phenylisobutylamine, and cathinone families which was developed in the 1960s,[3][4] which is classified as a designer drug.[5] It was first reported to the EMCDDA in 2014 and became widespread internationally in 2019-2020 following bans on the related compound ephylone.[6][7][8][9] It is a synthetic cathinone.[9] In 2021, eutylone was the most common cathinone identified by the Drug Enforcement Administration in the United States