Home
    Disclaimer
    πŸ§ͺ This is a research chemical with limited data on its long-term health effects, toxicity profile, and safe dosage ranges.

    Butylone

    Aliases: B1, Ξ’k-mbdb, Bk-methyl-j, bk-mbdb

    Summary TheDrug.Wiki Erowid TripSit PsychonautWiki

    Butylone is a synthetic cathinone structurally related to MDMA and methylone, but with milder entactogenic effects and stronger stimulation. It was first synthesized in 1967 but remained obscure until 2005. Reported to be less potent than methylone, with more dopaminergic stimulation and less serotonergic euphoria.

    Dose Information TheDrug.Wiki TripSit PsychonautWiki

    ROA Light Common Strong Heavy
    Oral 40-80mg 80-125mg 125-225mg 225mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki TripSit PsychonautWiki

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 20-40 min 30-60 min 1-2 hrs 2-3 hrs 1-4 hrs 3.8-6.7 hrs

    Effect Profile

    31 reports

    Scores (1–10) curated from multiple sources:

    • Effect keyword matching from PsychonautWiki catalog
    • Validated against 31 Erowid trip reports
    • Weighted by importance: core (×3), major (×2), minor (×1)

    Full methodology

    Empathogen 8.7
    Intense+ 9/10

    Strong euphoria, stimulation, and sensory enhancement with moderate empathy

    Empathy / Social Openness ×3
    7
    empathy, love, and sociability enhancement
    Euphoria / Mood Elevation ×2
    10
    physical euphoria cognitive euphoria
    Stimulation ×1
    10
    stimulation teeth grinding increased heart rate
    Sensory Enhancement ×1
    10
    tactile enhancement increased libido
    Stimulant 7.8
    Intense 8/10

    Strong euphoria, anxiety/jitters, focus, and stimulation

    Stimulation / Energy ×3
    8
    stimulation
    Euphoria / Mood Lift ×2
    10
    physical euphoria cognitive euphoria motivation enhancement
    Focus / Productivity ×2
    9
    analysis enhancement thought acceleration motivation enhancement
    Anxiety / Jitters ×1
    10
    anxiety teeth grinding increased heart rate

    Tolerance

    Build-up develops rapidly, often within a single session; compulsive redosing common
    Reset a few days for acute tolerance

    Tolerance Decay

    Full tolerance 12h Half tolerance 4d Baseline ~14d

    Evidence for tolerance kinetics in butylone is limited to user reports and extrapolation from other serotonergic cathinones. Acute tolerance develops within a session and across consecutive days; perceived effects drop markedly on day 2–3, with partial recovery over 1–2 weeks and closer to baseline by ~3–4 weeks. Cross‑tolerance is likely with MDMA/methylone due to overlapping transporter mechanisms. Data quality: anecdotal/theoretical.

    Cross-Tolerances

    Effects Erowid

    Aggregated from 31 Erowid experience reports

    Positive Effects 9

    Euphoria 64.5% 70%
    Stimulation 58.1% 70%
    Empathy 38.7% 70%
    Music Enhancement 35.5% 70%
    Tactile Enhancement 32.3% 70%
    Focus Enhancement 25.8% 70%
    Introspection 25.8% 70%
    Body High 16.1% 70%
    Color Enhancement 16.1% 70%

    Adverse Effects 10

    Anxiety 38.7% 70%
    Jaw Clenching 32.3% 70%
    Confusion 25.8% 70%
    Increased Heart Rate 19.4% 70%
    Nausea 19.4% 70%
    Appetite Suppression 12.9% 70%
    Memory Suppression 12.9% 70%
    Headache 12.9% 70%
    Pupil Dilation 9.7% 70%
    Sweating 9.7% 70%

    Combinations TripSit

    Helpful Links