Research chemicalResearch chemicalBenzodiazepine analogueDepressant

Flunitrazolam

Also known as Flunitrazolam

Written by enwyReviewed 15 Jul 20261 sources0 comments

Flunitrazolam is a triazolo analogue of flunitrazepam and one of the most potent designer benzodiazepines known, active in the microgram range. It has no clinical study in humans and carries a high risk of overdose because minute quantities are strongly sedating.

01 Overview

Flunitrazolam combines the flunitrazepam structure with a triazole ring, producing extreme potency. It is sold as a research chemical, frequently on blotters, and is active at doses of only tens to hundreds of micrograms, which makes accurate dosing very difficult outside a laboratory.

It is a GABA-A positive allosteric modulator. Its potency means that small errors in measurement can cause deep sedation, amnesia and dangerous respiratory depression, particularly if combined with other depressants. There is no formal human pharmacokinetic or safety data.

02 Mechanism

Positive allosteric modulation of GABA-A receptors at the benzodiazepine site; extreme binding potency produces strong effects at microgram doses.

03 Dosing

Tier	Dose	Route	Notes
Light	0.05–0.15 mg	Oral	Active in the microgram range; extremely difficult to measure safely.
Common	0.15–0.3 mg	Oral	Strong sedation and amnesia; high overdose risk.

04 Effects

Effect	Magnitude	Evidence
AnxiolysisReduction in anxiety at low doses.		Anecdotal
SedationDeep sedation even from tiny quantities.	very strong	Anecdotal
Muscle relaxationReduced muscle tension.		Anecdotal

05 Side effects

Effect	Severity	Frequency	Evidence
Overdose from potencyMicrogram activity makes accidental overdose easy without laboratory measurement.	Life-threatening	Common given dosing difficulty	Observational
Physical dependenceRapid tolerance and dependence; withdrawal can include seizures.	Severe	Common with regular use	Observational
Blackouts / anterograde amnesiaPronounced memory loss during intoxication.	Moderate	Very common	Anecdotal
Additive respiratory depressionDangerous with opioids or alcohol.	Life-threatening	High risk in combination	Observational

06 Legal status

United States

Not federally scheduled

as of Jan 2026

United Kingdom

Class C

Captured by the UK generic benzodiazepine control. · as of Jan 2026

07 References

Highly potent designer benzodiazepines: flunitrazolam and analoguesPubMed search

08 Discussion0 comments

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This page is reference information, not medical advice. Doses and protocols are documented as they appear in the clinical literature and in practice — describing them is not a recommendation to use them. Countermeasures listed here are not a substitute for a physician. Legal status varies by jurisdiction and changes.