Ethylone

Ethylone, also known as bk-MDEA or MDEC, is a synthetic cathinone with stimulant and entactogenic properties. It is the β-keto analogue of MDEA and is structurally related to methylone and MDMA. Ethylone appeared on the recreational drug market in the early 2010s and has been detected in counterfeit MDMA products, emergency presentations and post-mortem toxicology.

Chemistry and history

Ethylone is a methylenedioxy-substituted cathinone with an N-ethyl group. Its structure is closely related to methylone, but the nitrogen carries an ethyl group rather than a methyl group. It is also related to MDEA, with the beta-keto group distinguishing it from the corresponding amphetamine.

Ethylone was reported in recreational drug markets in the early 2010s and was sometimes sold as a substitute for MDMA or methylone. The similarity of its name to ephylone has led to confusion, but the two compounds have different structures and pharmacological profiles.

Pharmacology

In vitro studies found that ethylone inhibits dopamine, norepinephrine and serotonin uptake. It also acts as a substrate at the serotonin transporter, promoting serotonin release. This mixed profile resembles that of methylone and other entactogenic cathinones, although the relative activity at individual transporters differs (Simmler and colleagues, 2013).

These findings support a stimulant-entactogen classification. They do not establish that ethylone produces effects identical to MDMA, since small structural changes can alter transporter activity and the balance of monoamine effects.

Subjective effects

The PsychonautWiki profile of ethylone includes accounts of stimulation, euphoria and empathogenic effects, often compared with methylone or MDMA. The intensity and character of the emotional effects vary between reports.

Physical effects

Reported effects include increased energy, physical stimulation and tactile enhancement. Sweating, jaw tension, increased heart rate, reduced appetite and difficulty sleeping are also described. Some users report nausea, dehydration and physical discomfort as the effects fade.

Cognitive and emotional effects

Euphoria, disinhibition, increased sociability and appreciation of music are common themes in user reports. Some describe emotional openness and empathy, while others report a more straightforward stimulant effect. Anxiety, agitation and confusion may occur, particularly in more intense or prolonged experiences.

Clinical and forensic findings

A 2015 case report described a fatal mixed intoxication involving ethylone, heroin and alprazolam. Ethylone was quantified in several post-mortem samples, but the cause of death was attributed to the combined effects of the substances rather than ethylone alone (McIntyre and colleagues, 2015).

Ethylone has also appeared in broader forensic reviews of synthetic cathinones, which document stimulant-related symptoms such as tachycardia, agitation, hyperthermia and psychiatric disturbance. Mixed-drug exposure is common in these cases and complicates attribution.

Toxicity and research limitations

Ethylone has a clearer laboratory pharmacological profile than many newer cathinones, but its clinical safety remains incompletely characterised. Case reports show that it can be present in serious and fatal intoxications, although the contribution of other substances must be considered.

Controlled human research on ethylone is limited, and its long-term effects, dependence potential and withdrawal profile have not been established. Findings from methylone or MDMA provide context but should not be treated as direct evidence about ethylone.

Related compounds

Ethylone is related to Butylone, Ephylone, Methylone and MDEA. It is the β-keto analogue of MDEA and the N-ethyl counterpart of methylone.