BZP - Substance Search

Summary dose.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 dose.wiki TripSit

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

Light Common Strong Heavy

Onset, Duration & After-effects dose.wiki TripSit

ROA	Onset	Comeup	Peak	Offset	After Effects	Total
Oral	30-90 min	30-60 min	2-4 hrs	2-4 hrs	24 hrs	4-6 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

Add to PsychonautWiki Journal

The PsychonautWiki Journal logging app doesn't include every substance. To track BZP there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:

⬇ Download import file Import this file as custom substances and you get "BZP (Substance Search)" with every route's full dose ladder and timeline, no typing. Works on iOS and Android (v15+); the format is confirmed by the app's developer. The manual values below work for older versions.

Name

BZP

Unit

mg

Description

BZP
Source: SubstanceSearch (substancesearch.com)

Oral dose (mg): light 40-70 · common 70-100 · strong 100-130 · heavy 130+

Oral duration: onset 0.5-1.5h · come-up 0.5-1h · peak 2-4h · offset 2-4h · total 4-6h · after-effects 24h

Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.

Tip: for quicker logging you can also add a Custom Unit in the app, e.g. common dose ~ 85 mg (Oral).

The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.

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 ~18d

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%

Community Trip Reports

Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance. Tags summarise each author's own verdict — how reports are classified.

Erowid 8 reports 1 positive 5 neutral 2 cautionary visit

Fun But No Potential neutral exp #18788

Well I'm taking a break (I guess) from 'researching' - it seems like about time I contributed something to the community. First a bit of history - I have done weed, LSD, mushrooms, xtc, special k, (BZP), perscription pain killers/muscle relaxers, and a whole bunch of herbal assortments (most of which were not worth my...

An Enjoyable Buzz neutral exp #103652

Setting: Mostly in my room, listening to music. No prescription meds. I live in the countryside and have a beautiful forest to stare into when looking out of my window. I am however extremely thin due to my metabolism. My body simply does not absorb as many nutrients as others.

A Hidden Significance In My Life cautionary exp #29428

I hope that in writing this people will think twice before deciding to go off and be smart little pricks. I've only very recently come to admit this to myself... How BZP, a stimulant, has played a significant role in who I am today.

First Time -- Mediocre positive exp #15515

Dose: 200 mg BZP (benzylpiperazine) Setting: I'm on a two hour drive to visit my bf. Experience: with most other drugs, much experience with stimulants. First time with BZP. Note: I am taking corticosteroids for an allergic reactions (40 mg prednisone/day).

Real-Time Geek Report neutral exp #46860

I've tried BZP a few times before at doses between 150mg - 200mg and thought it was basically similar to Adderall except maybe a little bit more fun and a little bit less focused. Anyway, today I am going to eat some with the intent of practicing guitar for a few hours.

A Pleasant Stimulant neutral exp #2947

I have been experimenting with BZP HCl recently to see if it would be a mild substitute for ecstasy or maybe even some sort of speed. I have never tried speed (caffeine) before but I think I have a good idea what it would be like.

Imperfect Medicine cautionary exp #14577

Tending toward hypersomnolent depression, I've always gravitated to stimulants as a partial (and very imperfect) solution. I'm an avowed caffeine junkie, and I use ephedrine sporadically. So, BZP (1-Benzylpiperazine/N-Benzylpiperazine) seemed like a nice candidate for exploration.

Twisted Stuff neutral exp #18702

Well i hadn't really heard of BZP before a guy i know told me that he had 100 g. of the stuff, freebase crystallized to HCl. I thought that i might as well try it and bought 200 mg from him. I'm pretty skinny and sensitive to some drugs so i asked him to split it in 2 capsules of 100 mg.

Bluelight 3 threads 3 neutral visit

Bzp First Time Excellent Awful neutral

Long time lingerer...First time poster.Background: Been interested in experimenting with piperazines for a long time. Came across 1 gram, and decided to give it a go.

Bzp First Time Mediocre neutral

Dose: 200 mg BZP i.e. benzylpiperazine Setting: I'm on a two hour drive to visit my bf. Experience: with most other drugs, much experience with stimulants. First time with BZP. Note: I am taking corticosteroids for an allergic reactions (40 mg prednisone/day).

Bzp 225mg Some Exp Real Time Geek Report neutral

I've tried BZP a few times before at doses between 150mg - 200mg and thought it was basically similar to adderall except maybe a little bit more fun and a little bit less focused. Anyway, today I am going to eat some with the intent of practicing guitar for a few hours.

BZP's nerd page Pharmacology, chemical data, effect profiles, and more

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Helpful Links

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Spotted incorrect or dangerous information, have a correction, a new study, or a useful addition for BZP? Let us know. Reports are reviewed by moderators — this is not posted publicly.

BZP Encyclopedic Encyclopedic Typical encyclopedia coverage. Cross-reference for important decisions. 4 corroborating sources 1 ROA with full dose ladder duration data present classified Research-chemical