Butylone, also known as β-keto-N-methylbenzodioxolylbutanamine (βk-MBDB), is an entactogen, psychedelic, and stimulant psychoactive drug of the phenethylamine, amphetamine, phenylisobutylamine, and cathinone families.

Formal research on this chemical was first conducted in 2009, when it was shown to be metabolised in a similar manner to related drugs like methylone.

[4] Butylone acts in a similar way as MDMA and Methylone, it causes an increase in extracellular monoamine levels.

[8] Scheduled in the "government decree on psychoactive substances banned from the consumer market".

[9] Sveriges riksdag added butylone to schedule I ("substances, plant materials and fungi which normally do not have medical use") as narcotics in Sweden as of Feb 1, 2010, published by Medical Products Agency in their regulation LVFS 2022:48 listed as Butylon, 1-(1,3-bensodioxol-5-yl)-2-(metylamino)butan-1-on.