Clobromazolam
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 2 corroborating sources
- 3 ROAs with full dose ladders
- duration data present
- 27 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
- 2 corroborating sources
- 3 ROAs with full dose ladders
- duration data present
- 27 combo interactions documented
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
Aliases: Dm-ii-90, Phenazolam, Brn 4550445
Summary
Phenazolam is the same compound as clobromazolam; it first appeared on the market circa 2016 and has no approved medical use. Forum meta-reports consistently place its potency at approximately 40 times that of diazepam, with 0.25 mg often compared to 10 mg diazepam or 0.5 mg alprazolam; avoid any pressed tablets claiming multi-milligram doses. Onset is notably slow for a triazolobenzodiazepine, often 1-2 hours and sometimes 3 hours, which greatly increases redosing risk and blackout potential.
Dose Information
Dose basis. Oral: Ranges compiled from aggregated user reports on harm-reduction forums; not clinical data. Extreme sub-milligram potency — volumetric dosing strongly advised. Pressed tablets/pellets on the market have been reported at 1–3 mg and can be dangerously overdosed; never ‘eyeball’ powders or shave tablets. Sources: Bluelight megathread, Reddit PSA/warnings. Sublingual: Frequently equivalent to oral in onset and duration for this compound; users often swallow saliva before full absorption. Use volumetric solutions to meter microgram-level doses. (Dose figures and this note are from Drugs.Wiki.)
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 0.05-0.15mg | 0.15-0.30mg | 0.30-0.50mg | 0.50mg+ |
| Sublingual | 0.05-0.15mg | 0.15-0.30mg | 0.30-0.50mg | 0.50mg+ |
| Rectal | 0.05-0.15mg | 0.15-0.30mg | 0.30-0.50mg | 0.50mg+ |
Sources
Onset, Duration & After-effects
| ROA | Onset | Peak | Offset | Total |
|---|---|---|---|---|
| Oral | 0.75-2 hrs | 2-6 hrs | 4-10 hrs | 8-16 hrs |
| Sublingual | 0.75-2 hrs | 2-6 hrs | 4-10 hrs | 8-16 hrs |
| Rectal | 0.75-2 hrs | 2-6 hrs | 4-10 hrs | 8-16 hrs |
Effect Profile
Scores (0–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Strong anxiolysis and sedation with strong cognitive impairment, moderate euphoria
Tolerance
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
Effects
Effect glossary — · full glossary
Combinations
Cross-Check Clobromazolam with another substanceHelpful Links
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track Clobromazolam there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:
Clobromazolam Source: SubstanceSearch (substancesearch.com) Oral dose (mg): threshold 0.05 · light 0.05-0.15 · common 0.15-0.30 · strong 0.30-0.50 · heavy 0.50+ Sublingual dose (mg): threshold 0.05 · light 0.05-0.15 · common 0.15-0.30 · strong 0.30-0.50 · heavy 0.50+ Rectal dose (mg): threshold 0.05 · light 0.05-0.15 · common 0.15-0.30 · strong 0.30-0.50 · heavy 0.50+ Oral duration: onset 0.75-2h · peak 2-6h · offset 4-10h · total 8-16h · after-effects 12-36h Sublingual duration: onset 0.75-2h · peak 2-6h · offset 4-10h · total 8-16h · after-effects 12-36h Rectal duration: onset 0.75-2h · peak 2-6h · offset 4-10h · total 8-16h · after-effects 12-36h 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 ~ 0.22 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.
Report an issue or suggest an edit
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