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. Memory fog and residual sedation can persist for days. Enterohepatic circulation contributes to the exceptionally long half-life.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 3-5mg | 5-8mg | 8-12mg | 12mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | After Effects | Total |
|---|---|---|---|---|---|---|
| Oral | 20-90 min | 1-3 hrs | 2-6 hrs | 12-24 hrs | 72 hrs | 360-0 min |
Tolerance
Build-up
develops over 1–4 weeks of daily use; hypnotic tolerance faster than anxiolytic tolerance
Reset
weeks to months depending on half-life and duration of use; taper recommended
Effects
Positive
- Muscle relaxation
- Physical euphoria
- Seizure suppression
- Anxiolytic
- Muscle Relaxant
Negative
- Respiratory depression
- Sedation
- Sleepiness
- Residual sleepiness
- Sedative
- Dystaxia
- Hypnotic
Positive
- Anxiety suppression
- Cognitive euphoria
Negative
- Motor control loss
- Memory suppression
- Amnesia
- Compulsive redosing
- Delusions of sobriety
- Analysis suppression
- Thought deceleration
- Emotion suppression
- Dizziness
- Rebound anxiety
- Irritability
- Delusions
- Information processing suppression
- Dream suppression or Dream potentiation
Positive
- Increased libido
- Appetite enhancement
Negative
- Disinhibition
- Acuity suppression
- Decreased Libido
- Acuity Suppression
- Visual acuity suppression
- Double vision
- Dulled perception
- Perception of bodily heaviness