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Psychedex
Facts label

Flunitrazepam Facts

Depressant; Hypnotic; Sedative; Benzodiazepine; GABA-A receptor positive allosteric modulator

Dose and durationby route · individual sensitivity varies

Oral(mg)
Threshold< 0.2 mgLight0.5 – 1 mgCommon1 – 3 mgStrong3 – 4 mgHeavy4+ mg

Starts in 15 – 30 minLasts 4 – 8 hoursAfter-effects 2 – 24 hours

Body and dependence

Acute toxicity
High
Chronic toxicity
Moderate
Physical dependence
High
Psychological dependence
High
Withdrawal
Life-threatening · fatal · medical supervision
Compulsive redosing
Moderate

Tolerance

Builds
Rapid
Fully resets after
10.5 days
Carries over to
benzodiazepines; ethanol; barbiturates

Effectslikely at a common dose

Perception
Dreaming suppression; +8 possible, including Vestibular distortion, Visual acuity suppression, Double vision
Body
Bodily heaviness; Dizziness; Motor control impairment; Muscle relaxation; Physical fatigue; Sedation; +13 possible, including Nystagmus (eye wobbles), Headache, Nausea
Thinking
Analysis suppression; Cognitive fatigue; Cognitive impairment; Decision impairment; Focus suppression; Information processing suppression; Memory fragmentation; Memory suppression; Thought deceleration; +14 possible, including Confusion, Delusions of sobriety, Language suppression
Feeling
Anxiety suppression; +3 possible, including Depression
Self
Disinhibition; +11 possible, including Communication suppression, Craving, Social disconnection
Time
none likely · 2 possible, including Temporal disorientation

Who shouldn't take it

Absolute
Obstructive sleep apnea; Myasthenia gravis; Pregnancy; Concurrent opioid use; Concurrent ethanol use
Relative
History of substance use disorder; Severe hepatic impairment

Combinations60 recorded

Lethal (1)
Opioids
Dangerous (21)
Alpha-2 adrenergic receptor antagonist; Antipsychotics; Atypical antipsychotics; Benzodiazepines; Buprenorphine, Kratom; Cannabis, THC; Clonidine, Guanfacine; Gabapentin, Pregabalin; GHB, Baclofen; GHB, GBL; Local anesthetics; Naltrexone; SNRIs; Stimulants; Synthetic cannabinoids; Ibogaine; Ketamine, DXM, PCP; MAOIs; NSAIDs; Poppers (Alkyl nitrites); Poppers, Nitrates
Caution (26)
See full page: psychedex.org/substances/flunitrazepam
Not graded (12)
Not listed never means safe.

Seek help immediately if

  • Extreme drowsiness — can't stay awake or be roused
  • Confusion, slurred speech, severe loss of coordination
  • Slow, shallow, or irregular breathing
  • Unconsciousness / unresponsive; limp, floppy body
  • Blue lips or fingertips
  • Vomiting while sedated (choking / aspiration risk)
  • Cold, clammy skin; weak pulse

What to do

  1. Try to wake them — shout, firm sternal rub
  2. If unresponsive or breathing is impaired, call emergency services
  3. Place them in the recovery position — critical, they can choke on vomit
  4. Monitor breathing continuously; be ready to give rescue breaths / CPR
  5. Never leave them alone to "sleep it off"
  6. Do not give other drugs, stimulants, or more depressants

Most depressant overdoses resolve with airway protection, breathing support, and monitoring. The danger is respiratory depression and choking on vomit — sharply worse when combined with opioids or alcohol. GHB/GBL overdoses often involve sudden deep unconsciousness and may self-resolve, but airway protection is essential.

988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE

psychedex.org/substances/flunitrazepam · Version r1 · Not medical adviceValues as of
On the printout