Eutylone (bk-EBDB)
Eutylone (bk-EBDB, N-ethyl homologue of butylone) is a methylenedioxy synthetic cathinone with combined stimulant and mild entactogenic effects. From around 2019 it became a common substitute for MDMA and eutylone-adulterated 'ecstasy', and has been widely detected in seized and mis-sold products. Human pharmacology is uncharacterised beyond toxicology and monitoring data.
01 Overview
Eutylone belongs to the methylenedioxy cathinone group and is often encountered as a cheaper MDMA replacement, sometimes sold as MDMA itself. It is reported as more stimulating and less euphoric than MDMA, with a notably long duration that, combined with delayed onset, drives problematic redosing and insomnia. It is used orally and by insufflation.
Data are limited to early-warning-system detections, forensic reports and seized-drug surveillance, where it has featured prominently in mis-sold ecstasy. Class hazards apply: cardiovascular strain, compulsive redosing, severe comedown with prolonged insomnia, and unconfirmed long-term neurotoxicity.
02 Mechanism
Monoamine releaser/reuptake inhibitor at dopamine, noradrenaline and serotonin transporters with proportionally more catecholaminergic than serotonergic activity, giving stimulant-dominant effects with mild entactogenic character.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Light | 30–75 mg | Insufflated | Faster onset; harsh nasally. |
| Light | 50–100 mg | Oral | Delayed onset ~45-90 min risks over-redosing before it takes effect. |
| Common | 100–200 mg | Oral | Long duration; redosing worsens insomnia and comedown. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| StimulationEnergy, wakefulness and increased sociability; more stimulating than MDMA. | Anecdotal | ||
| Mild entactogenic warmthSome empathy and openness reported, weaker than MDMA. | Anecdotal | ||
| Compulsive redosingDelayed onset and long duration promote redosing and severe insomnia. | Observational |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Prolonged insomnia and severe comedownLong duration causes extended wakefulness followed by low mood, anxiety and fatigue. | Moderate | Very common | Observational | |
| Long-term neurotoxicity (unknown)No human data; long-term effects unestablished. | Moderate | Unknown | Unconfirmed | |
| Cardiovascular strainTachycardia, palpitations and hypertension reported. | Severe | Common | Observational |