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    🧪 This is a research chemical with limited data on its long-term health effects, toxicity profile, and safe dosage ranges.

    BZP

    Aliases: A2, Pep x, Frenzy, Legal x, Nemesis

    Stimulant Research-chemical

    Summary TheDrug.Wiki Erowid TripSit

    BZP was marketed as a legal alternative to amphetamines and MDMA in the early 2000s but is now illegal in many countries. It is approximately 10% the potency of dexamphetamine. Side effects include anxiety, insomnia, nausea, headaches, and seizures at high doses.

    Dose Information TheDrug.Wiki TripSit

    ROA Light Common Strong Heavy
    Oral 40-70mg 70-100mg 100-130mg 130mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TheDrug.Wiki TripSit

    ROA Onset Comeup Peak Offset After Effects Total
    Oral 30-90 min 30-60 min 2-4 hrs 2-4 hrs 24-24 hrs 5-10.5 hrs

    Effect Profile

    30 reports

    Scores (1–10) curated from multiple sources:

    • Effect keyword matching from PsychonautWiki catalog
    • Validated against 30 Erowid trip reports
    • Weighted by importance: core (×3), major (×2), minor (×1)

    Full methodology

    Stimulant 7.0
    Strong+ 7/10

    Strong stimulation, anxiety/jitters, and euphoria with mild focus

    Stimulation / Energy ×3
    10
    stimulation increased energy wakefulness alertness enhancement
    Euphoria / Mood Lift ×2
    8
    euphoria
    Focus / Productivity ×2
    5
    focus enhancement
    ⚠ Anxiety / Jitters ×1
    10
    anxiety increased heart rate teeth grinding bruxism vasoconstriction
    Based on reports from:
    Erowid Experience Reports PsychonautWiki BZP
    View methodology →

    Tolerance

    Build-up develops over days to weeks of regular use
    Reset 3–7 days for acute tolerance; longer for full reset

    Tolerance Decay

    Full tolerance 2d Half tolerance 3d Baseline ~10d

    Tolerance patterns inferred from stimulant-like use; high uncertainty. Many users report diminished effects after consecutive-day use and substantial recovery after 1–2 weeks off. Avoid frequent redosing within a single session to limit adverse events.

    Cross-Tolerances

    Amphetamines
    30%
    Other stimulants (general)
    20%

    Effects Erowid

    Aggregated from 30 Erowid experience reports

    Positive Effects 8

    Stimulation 56.7% 70%
    Euphoria 56.7% 70%
    Empathy 46.7% 70%
    Music Enhancement 36.7% 70%
    Tactile Enhancement 30.0% 70%
    Color Enhancement 20.0% 70%
    Body High 20.0% 70%
    Focus Enhancement 13.3% 70%

    Adverse Effects 8

    Anxiety 40.0% 70%
    Headache 36.7% 70%
    Confusion 23.3% 70%
    Nausea 23.3% 70%
    Jaw Clenching 16.7% 70%
    Sweating 13.3% 70%
    Increased Heart Rate 10.0% 70%
    Pupil Dilation 10.0% 70%
    BZP's nerd page Pharmacology, chemical data, effect profiles, and more
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    Helpful Links

    📘 Experience Reports 📖 TheDrug.Wiki 📖 TripSit 📖 PsychonautWiki