It was in 2014, now 6 years ago, that I acquired Flubromazolam. The moment I saw the molecule I knew I had to have it, the way the molecule is put together just SCREAMS extreme benzodiazepine.
Flubromazolam
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 27 combo interactions documented
- toxicity data (PsychonautWiki)
- classified Research-chemical
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 2 ROAs with full dose ladders
- duration data present
- 27 combo interactions documented
- toxicity data (PsychonautWiki)
- classified Research-chemical
Aliases: F-lam, Jyi-73, Liquid xanax, flam
Summary
Flubromazolam (JYI-73) is a novel synthetic depressant substance of the benzodiazepine, and specifically, the triazolobenzodiazepine class which produces anxiolytic, disinhibiting, sedative, muscle relaxant, and memory suppressing effects when administered. It is incredibly potent (active in the microgram range) with an unusually long 18 hour duration. Thus, it poses comparatively higher risks than other designer benzodiazepines, due to its ability to produce strong sedation and amnesia even at a very low threshold dosage.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 100-150ΞΌg | 150-250ΞΌg | 250-400ΞΌg | 400ΞΌg+ |
| Sublingual | 100-150Β΅g | 150-250Β΅g | 250-400Β΅g | 400Β΅g+ |
Light
Common
Strong
Heavy
Sources
Oral
Dose ladder — dose.wiki, PsychonautWikiSublingual
Dose ladder — LightβHeavy: same as the Oral row (dose.wiki, PsychonautWiki); no source states a Sublingual ladderBenzo Equivalence Calculator
mg
0.25
mg
Flubromazolam
=
β
mg
Diazepam
| Substance | Equivalent Dose | Potency |
|---|
⚠ These are approximate equivalences for educational and cross-tapering reference. Individual response, tolerance, and half-life differences mean actual equivalence varies. Always consult a healthcare provider for tapering guidance.
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 20-45 min | 30-90 min | 2-6 hrs | 6-12 hrs | 12-18 hrs |
| Sublingual | 15-30 min | 20-60 min | 2-6 hrs | 6-12 hrs | 6-12 hrs |
Effect Profile
5 reportsScores (0–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Benzodiazepine
6.3
Strong
6/10
Strong anxiolysis with strong cognitive impairment, mild sedation, low euphoria
Anxiolysis
×3
10
anxiety suppression
anxiolytic
muscle relaxation
muscle relaxant
emotion suppression
Sedation / Relaxation
×2
5
sedation
muscle relaxation
Motor / Cognitive Impairment
×1
8
motor control loss
amnesia
delusions of sobriety
double vision
Euphoria / Mood Lift
×1
2
disinhibition
Based on reports from:
Tolerance
Build-up
develops over 1β4 weeks of daily use; hypnotic tolerance faster than anxiolytic tolerance
Reset
Falls after you stop, at a rate that varies from person to person. If you've been using regularly, cut down gradually with medical help rather than stopping suddenly.
No tolerance chart. Our decay curves for these drugs were estimates, and a curve can make tolerance look longer-lasting than it is, which is the dangerous direction.
How fast tolerance to these drugs fades after a break has not been measured well enough to draw, so don't count on a dose you used to take still being safe: after time off, start with a much smaller amount and don't use alone. Mixing sedatives with each other, with alcohol or with opioids sharply raises the risk of a fatal overdose. If you've been using regularly, don't stop suddenly: withdrawal from benzodiazepines, alcohol or GHB/GBL can cause seizures or delirium, so get medical help to cut down gradually.
Sources: FRANK: benzodiazepines Β· Alcohol and Drug Foundation: GHB Β· FDA 2020: benzodiazepine boxed warning Β· FDA 2019: gabapentinoids and breathing Β· NHS: alcohol use disorder
Cross-Tolerances
Benzodiazepines
Effects
Effect glossary — · full glossary
Positive
Negative
Positive
Negative
Positive
Negative
Combinations
Cross-Check Flubromazolam with another substanceCommunity Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, Bluelight, and Dose.wiki. 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 5 reports 2 neutral 3 cautionary visit
[This report is a continuation of another one, A Unexpected Surprise In My Mailbox , submitted the same day.] I used 0.25mg of flubromazolam for a couple months each day after work. It was mild to me I enjoyed it and did abuse it. I ran out and was waiting for more to come in.
A lot of information available is pretty daunting on first discovery of said substance. And itΒs definitely true what is said about liquid and volumetric dosing. That said with the substance eyeballed in such a way so as to not vastly exceed the mg range. ItΒs a creeper. ItΒs strong.
I try to be descriptive in my reports, but that isn't really possible here. I'll expand as much as I can. Background/Notes: I'm pretty experienced with drugs, done every class multiple times at different doses. I like them all, from stims to deliriants and everything in between.
So let me clarify, yes this was a dose of 30 MILLIGRAMS, NO IT WAS NOT AN INTENTIONAL DOSE.... I was using flubro for about 2-3 weeks, I was pretty experienced with benzos, using alpraz, etiz and clonazolam/pam daily, I thought I had a tolerance to these but flubro taught me I was laughing at the devil to his face tryi...
Bluelight 2 threads 1 positive 1 cautionary visit
It was in 2014, now 6 years ago, that I acquired Flubromazolam. The moment I saw the molecule I knew I had to have it, the way the molecule is put together just SCREAMS extreme benzodiazepine.
Virgin Test -- 0.5mg Flubromazolam orally Flubromazolam (NOT flubromazepam) is a highly potent benzodiazepine available through selected RC vendors. Being related to triazolam and alprazolam, its potency has been described as "as potent as Triazolam, twice as potent as alprazolam or flunitrazepam and 'considerably more...
Flubromazolam's nerd page
Pharmacology, chemical data, effect profiles, and more
→
Helpful Links
Add missing routes to PsychonautWiki Journal
The PsychonautWiki Journal app already has Flubromazolam, but its built-in entry only covers Oral. Here are the other routes we have data for. You can't edit a built-in substance, but you can add a Custom Unit for any of these routes to log it.
⬇ Download import file
Import this file as custom substances
and you get "Flubromazolam (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.
Custom Unit doses
- Sublingualcommon ~ 200 ΞΌg
Dose & duration (reference)
Flubromazolam: routes the PsychonautWiki Journal app is missing Source: SubstanceSearch (substancesearch.com) Sublingual dose (ΞΌg): threshold 50ug Β· light 100-150Β΅g Β· common 150-250Β΅g Β· strong 250-400Β΅g Β· heavy 400Β΅g+ Sublingual duration: onset 15-30m Β· come-up 0.33-1h Β· peak 2-6h Β· offset 6-12h Β· total 6-12h Β· after-effects 12-24h Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.
Custom Units carry a single dose per route, so the full ranges live in the reference above. A route's suggested dose is the midpoint of its common range. Ranges are harm-reduction guidance, not a prescription.
Report an issue or suggest an edit
Spotted incorrect or dangerous information, have a correction, a new study, or a useful addition for Flubromazolam? Let us know. Reports are reviewed by moderators — this is not posted publicly.