Stimulant · Psychedelic

Pentylone

Also called 4-Meppp, BK-MBDP, Bk-methyl-k, Methylbenzodioxolylpentanamine

Original Wikipedia articleen.wikipedia.org/wiki/Pentylone revision used (24 October 2026)

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Common dose · Oral20–40 mg TS

Dosage

Oral

Source	Threshold	Light	Common	Strong	Heavy
TripSit	–	10–20 mg TS	20–40 mg TS	40–80 mg+ TS	–

TripSit dose text

TripSit's factsheet also states its doses as text.

Light: 10-20mg Common: 20-40mg Strong: 40-80mg+ TS

What dose are you on? (self-reported, unverified)

Read this first. These numbers come from anonymous visitors typing in a box. Nobody checks them. People misjudge, mistype, troll, or take untested products of unknown strength. They are not a dose guide and never override the sourced table above. They exist only so the sourced ranges can be compared with what people say they take. If you are deciding what to take, use the sourced table, start low, and read the risks section.

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Duration

TripSit factsheet

Onset: Insufflated: 10 minutes · Oral: 20-40 minutes TS
Duration: 3-4 hours TS
Aftereffects: 1-6 hours TS

Mixing

For best safety practice, don't mix this drug with other stimulants.

Why: vasoconstriction, heart rate and blood pressure. PsychonautWiki says:

“... may be dangerous to combine with other stimulants ... as they can increase one's heart rate and blood pressure to dangerous levels.” (PsychonautWiki, dangerous interactions table, "Stimulants" row, revision 148925)
“Vasoconstriction can be described as a narrowing of the veins and blood vessels which results from a contraction of their muscular wall.” (PsychonautWiki, Vasoconstriction, revision 170337)
“... it can also occur under the influence of traditional stimulants such as methamphetamine, caffeine, and MDMA.” (PsychonautWiki, Vasoconstriction, revision 170337)
“Increased blood pressure is most commonly induced under the influence of heavy dosages of vasoconstricting compounds, such as traditional stimulants and stimulating psychedelics.” (PsychonautWiki, Increased blood pressure, revision 152273)

Quotes from PsychonautWiki, CC BY-SA 4.0.

Acute combinations: what happens when these are taken close together. Entries backed by a medical journal or agency are listed first.

Backed by medical journals

Awaiting sourcePeer-reviewed reports on acute combinations, from PubMed and the journals the harm reduction sites cite.

Risks and toxicity

Awaiting sourceToxicity, overdose signs and dependence risk from harm reduction sites and journals.

Testing

Awaiting sourceReagent reactions and test kit guidance from a harm reduction testing service.

Effects

Awaiting sourceSubjective and physical effects from PsychonautWiki or TripSit.

Overview

A stimulant, empathogen and substituted cathinone. It was first synthesised in the 1960s, and re-appeared on the research chemical scene in 2010. Still, very little is known about the pharmacology or effects of this compound. TS

Pentylone, also known as β-ketoN-methyl-1,3-benzodioxolylpentanamine (bk-MBDP), is a stimulant developed in the 1960s. It is a substituted cathinone that has been identified in some samples of powders sold as "NRG-1", along with varying blends of other cathinone derivatives including flephedrone, MDPBP, MDPV, and 4-MePPP. It was also found in combination with 4-MePPP being sold as "NRG-3". Reports indicate side effects include paranoia, agitation, and insomnia, with effects lasting for several days at high doses.[1][2][3] WP

History

Awaiting sourceHistory and culture from Wikipedia or PsychonautWiki, with their citations.

Legal status

Pentylone is banned in Canada, Germany, Sweden, the United States, and the United Kingdom.[4][5] WP

Pharmacology

Pentylone acts as a serotonin–norepinephrine–dopamine reuptake inhibitor (SNDRI) and a serotonin releasing agent.[6] WP

Chemistry

Formula: C13H17NO3 PC
CAS number: 698963-77-8 PC
Molar mass (g/mol): 235.28 PC
IUPAC name (computed by PubChem): 1-(1,3-benzodioxol-5-yl)-2-(methylamino)pentan-1-one PC
SMILES: CCCC(C(=O)C1=CC2=C(C=C1)OCO2)NC PC
InChIKey: DFMLULIEUUXXSA-UHFFFAOYSA-N PC
PubChem CID: 60208608
IUPAC name: (±)-1-(1,3-benzodioxol-5-yl)-2-(methylamino)pentan-1-one WP

User reports

Erowid erowid.org

Listings

Awaiting sourceExperience Vault listing and report categories.

Bluelight bluelight.org

Listings

Awaiting sourceTrip report threads and this substance's discussion forum.

Reddit reddit.com

Listings

Awaiting sourceTrip report posts and the relevant subreddits.

Pop culture

No references added yet.

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References

Other Substituted phenyl-α-amino ketones
Journal / agency Brandt SD, Freeman S, Sumnall HR, Measham F, Cole J. Analysis of NRG 'legal highs' in the UK: identification and formation of novel cathinones. Drug Testing and Analysis. September 2011. doi:10.1002/dta.204 · PMID 21960541
Journal / agency Bish J. Watch Out for Pentylone, the Horrible New MDMA Additive. Vice. 4 August 2017
Other Cannabinoider föreslås bli klassade som hälsofarlig vara
Other Schedules of Controlled Substances: Temporary Placement of 10 Synthetic Cathinones Into Schedule I. 7 March 2014
Journal / agency Simmler LD, Rickli A, Hoener MC, Liechti ME. Monoamine transporter and receptor interaction profiles of a new series of designer cathinones. Neuropharmacology. April 2014. doi:10.1016/j.neuropharm.2013.11.008 · PMID 24275046

Text and values on this page are quoted from Wikipedia (CC BY-SA 4.0), TripSit factsheets, PubChem (public domain). Each value links to the exact revision it came from.