DOSINA

Flunitrazepam

Depressant

Known as Rohypnol or 'roofies,' this infamous drug has similar qualities to most other benzodiazepines; sedating with strong hypnotic effects. Despite being known as a 'date rape drug' has only been implicated in a small number of such crimes. Danger of respiratory depression in combination with other depressants. May cause amnesia and lowered inhibitions in overdose.

RohypnolRoofiesRochesRuffiesCirclesForget PillForget Me PillLa RochaMexican ValiumR2Roach 2Rophies

Dose and effect data: PsychonautWiki (CC BY-SA 4.0) and TripSit (PolyForm Noncommercial 1.0.0). Less-used substance: fewer independent sources, so treat these numbers with extra caution.

Before you dose

⚠This substance's dose is not reliably weight-scaled - the ranges shown are population figures. Sensitivity varies far more between people than body mass explains.

Dose

Published population range

Threshold0.2 mg
Light0.5–1 mg
Common1–3 mg
Strong3–4 mg
Heavy / risk zone≥ 4 mg

No weight-based model for this substance — published ranges only.

Check an amount you already have

Timeline (oral)

Onset20–30 minutes
Afterglow120–1440 minutes
Total240–480 minutes

Bars show relative time in each phase, scaled to the total duration. Each phase keeps its colour in the list above.

Expected effects

  • Heavy sedation
  • Anxiolysis

Possible side effects

  • Profound amnesia and blackouts
  • Dependence
  • Associated with drug-facilitated crime because of the amnesia it causes
  • Respiratory depression when mixed

Known toxicity

  • low toxicity
  • potentially lethal when mixed with depressants like alcohol or opioids

Harm reduction

  • Depressants are the class where mixing kills most often: alcohol, benzodiazepines, GHB/GBL and opioids all suppress breathing when combined.
  • Never use alone. If you use alone, set up a check-in call with someone who will call emergency services if you do not answer.
  • Measure liquid doses with a syringe. Bottle caps, teaspoons and 'glugs' are how people take ten times the intended dose.
  • Sedation can be delayed. Do not re-dose before you can feel the previous dose fully.
  • Do not stop daily benzodiazepine or alcohol use abruptly - withdrawal can cause seizures and is potentially fatal. Taper with medical help.
  • Signs that someone needs emergency help: breathing slower than one breath every 4-5 seconds, blue lips, snoring that will not stop, unrousable, vomiting while unconscious.

Identify what you have

Zimmermann (reacts)violet / purple (22)

Reagent tests show what a substance probably is, not how pure it is or what else is in the mix. Fentanyl and nitazene test strips are the only reliable check for those, and quantitative lab testing is better than both.

Tolerance, dependence and detection

Toleranceback to baseline after 7 - 14 days
Addiction potentialextremely physically and psychologically addictive
After-effects2-24

Sources

• PsychonautWiki — Flunitrazepam (CC BY-SA 4.0)
https://psychonautwiki.org/wiki/Flunitrazepam

• TripSit wiki — Flunitrazepam (PolyForm Noncommercial)
https://wiki.tripsit.me

Dosina is educational harm-reduction information, not medical advice. Doses are population ranges from published sources and cannot account for your tolerance, health conditions or what is actually in your substance. Possession and use may be illegal where you live.