Obtained from a vendor that has thus far delivered what's on the label, at least to my knowledge. Was in "pallet" [pellet?] form, each (according to vendor) containing 8mg of flubromazepam. Record was kept by starting a timer on my phone when I took the drug, then referencing it before taking any notes.
Flubromazepam
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 4 corroborating sources
- 1 ROA with full dose ladder
- 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
- 1 ROA with full dose ladder
- duration data present
- 27 combo interactions documented
- toxicity data (PsychonautWiki)
- classified Research-chemical
Summary
Flubromazepam is an extremely long-acting designer benzodiazepine with effects lasting 18-72 hours depending on dose. First synthesized in 1960 but never marketed medically. The delayed onset (up to 3 hours) and extended duration make overdose common, as users may redose before initial dose takes full effect.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 2-4mg | 4-8mg | 8-12mg | 12mg+ |
Benzo Equivalence Calculator
mg
8.0
mg
Flubromazepam
=
—
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 | 20-90 min | 1-3 hrs | 2-6 hrs | 12-24 hrs | 6-34.5 hrs |
Effect Profile
3 reportsScores (0–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Benzodiazepine
7.1
Strong+
7/10
Strong anxiolysis and euphoria with strong cognitive impairment, mild sedation
Anxiolysis
×3
10
anxiety suppression
anxiolytic
muscle relaxation
muscle relaxant
emotion suppression
Sedation / Relaxation
×2
5
sedation
muscle relaxation
Motor / Cognitive Impairment
×1
10
motor control loss
memory suppression
amnesia
delusions of sobriety
double vision
Euphoria / Mood Lift
×1
10
cognitive euphoria
physical euphoria
disinhibition
Based on reports from:
Tolerance
Build-up
develops over 1–4 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 · Alcohol and Drug Foundation: GHB · FDA 2020: benzodiazepine boxed warning · FDA 2019: gabapentinoids and breathing · NHS: alcohol use disorder
Cross-Tolerances
Other benzodiazepines
Z-drugs (zolpidem, zopiclone)
Alcohol (GABAergic effects)
Effects
Aggregated from 3 single-substance Erowid experience reports; 1 Erowid reports where another drug was taken too are left out
Each bar shows the share of analyzed reports whose text mentions that effect — a mention is not always a first-hand experience (fear of an effect or something witnessed can count). Mentions saying the effect did not happen are left out; that check reads keywords, so it can miss some. The shaded band on a bar, and the small range after its number, is the 95% interval: where the share could plausibly be with other reports of the same kind. Fewer reports, wider band. Tap or hover any number for details. The second value is the Bluelight extractor's per-effect confidence; a dash means the row is Erowid-derived, which has no confidence measurement.
Too few reports for bars: these effects come from 3 single-substance Erowid reports, and a bar is drawn only from 20 reports or more. With fewer, a percentage cannot tell a common effect from a rare one. Counts are shown instead. Why 20?
Effect glossary — · full glossary
Positive Effects 0
Adverse Effects 1
3 of 3
–
Combinations
Cross-Check Flubromazepam 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 3 reports 1 neutral 2 cautionary visit
[Erowid Note: The dose described in this report is very high, potentially beyond Erowid's 'heavy' range, and could pose serious health risks or result in unwanted, extreme effects.
I used this pretty heavily during university, in the form of those orange 4mg "pellets", when my depression and anxiety remained undiagnosed and untreated. It was, in retrospect, a horrible choice for self-medication.
Flubromazepam's nerd page
Pharmacology, chemical data, effect profiles, and more
→
Helpful Links
Import into PsychonautWiki Journal
The PsychonautWiki Journal app includes Flubromazepam, but its built-in data can be thinner than ours. Importing this file adds a separate "Flubromazepam (Substance Search)" custom substance with our dose ranges and durations, so you can log against whichever you prefer. It leaves tolerance out on purpose, for the reason given under Tolerance above.
⬇ Download import file
Import this file as custom substances
and you get "Flubromazepam (Substance Search)" with every
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Android (v15+); the format is confirmed by the app's
developer.
Ranges are harm-reduction guidance, not a prescription.
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