Ethylone

Ethylone (β-keto-MDEA, bk-MDEA, 3,4-methylenedioxy-N-ethylcathinone) is a synthetic entactogen and stimulant of the cathinone chemical class, structurally derived from MDEA (MDE, "Eve") — the N-ethyl analog of MDMA — through the addition of a beta-ketone group to the alpha carbon. It belongs to the MDxx cathinone family alongside methylone, butylone, and mephedrone, sharing their dual stimulant and entactogenic character.

Ethylone acts as a mixed reuptake inhibitor and releasing agent for serotonin, dopamine, and norepinephrine, mirroring the general mechanism of MDMA but with a characteristically different balance: ethylone has a higher dopamine-to-serotonin activity ratio than MDMA, producing effects that are more prominently stimulant and less empathogenic. Users describe a combination of energy, euphoria, mild mood lift, and some emotional openness — positioned closer to a cathinone stimulant than to pure MDMA, while retaining more entactogenic qualities than non-methylenedioxy cathinones.

The duration of ethylone is typically 2–4 hours when taken orally — shorter than MDMA (3–5 hours) — and the overall intensity is generally reported as milder. The post-use period involves some serotonergic depletion-related comedown effects (low mood, fatigue), though these are usually less pronounced than post-MDMA.

As a cathinone analog of MDEA, ethylone carries the full spectrum of MDxx cathinone risks: serotonin syndrome in combination with MAOI agents, cardiovascular stimulation, potential serotonergic neurotoxicity with repeated heavy use, and the general cathinone-class compulsive redosing tendency. Harm reduction approaches for MDMA provide the closest applicable framework, with appropriate adjustments for cathinone-specific characteristics.