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Nitrous Facts

Dissociative; Depressant; Inorganic molecule; NMDA receptor antagonist

Description

Nitrous oxide (N₂O) — laughing gas, whippits, nangs — is a synthetic dissociative of the inorganic gas class. It blocks glutamate signaling in the brain and triggers natural opioid release, producing dissociation, pain suppression, and euphoria.[1][2][3]

Subjective effects include euphoria, warmth, dissociation, auditory distortion, and time alteration. The experience is defined by extreme brevity — the entire arc from first breath to baseline collapses into minutes, producing an intense burst of perceptual dissolution rather than a sustained journey.

Physical and psychological dependence is low, though compulsive daily use has been documented.[4] The acute danger is asphyxiation; the chronic danger is spinal cord damage caused by the gas permanently disabling vitamin B₁₂ — standard blood tests may miss this until nerve damage has occurred.[5][6]

Dose and durationby route · individual sensitivity varies

Inhaled(g)
Threshold< 4 gLight4 – 8 gCommon8 – 16 gStrong16 – 24 gHeavy24+ g

Starts in 5 – 10 secLasts 1 – 5 minAfter-effects 5 – 15 min

Body and dependence

Acute toxicity
Low
Chronic toxicity
High
Physical dependence
Negligible
Psychological dependence
Low
Withdrawal
None recorded
Compulsive redosing
Moderate

Tolerance

Builds
Moderate
Fully resets after
10 days

Effectslikely at a common dose

Perception
none likely · 11 possible, including Spatial disorientation, Vestibular distortion, Visual acuity suppression
Body
Spontaneous body sensations; Dizziness; Motor control impairment; Bodily lightness; Body high; Pain suppression; Tingling / electric sensations; Vibrations / buzzing; +11 possible, including Headache, Nystagmus (eye wobbles), Nausea
Thinking
Cognitive impairment; Cognitive euphoria; +15 possible, including Analysis suppression, Memory suppression, Confusion
Feeling
Anxiety suppression; Euphoria; +1 possible
Self
none likely · 6 possible, including Derealization, Depersonalization, Communication suppression
Time
Time alteration; +2 possible, including Temporal disorientation

Who shouldn't take it

Absolute
Pneumothorax; Vitamin B12 deficiency; Bowel obstruction; Middle ear disease; Recent ophthalmic surgery with intraocular gas
Relative
Pre-existing peripheral neuropathy or myelopathy; First trimester pregnancy

Combinations61 recorded

Lethal (1)
GHB, GBL
Dangerous (29)
Benzodiazepines; Benzodiazepines, Barbiturates; Buprenorphine, Kratom; GHB, Baclofen; Naltrexone; NSAIDs; Opioids; THC; Anticholinergics; Antihistamines; Antipsychotics; Clonidine, Guanfacine; Dopamine agonists; Gabapentin, Pregabalin; Ibogaine; Ketamine, DXM, PCP; Lithium; Local anesthetics; MAOIs; MDMA, Amphetamines; MDMA, MDA; NDRIs (Wellbutrin); NRIs; Psychedelics; and 5 more, see full page
Caution (25)
See full page: psychedex.org/substances/nitrous
Not graded (6)
Not listed never means safe.

Seek help immediately if

No emergency profile is recorded for this substance. Not recorded never means no risk.

988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE

Version r1 · Not medical advice

References

  1. [1]
    ^Ogata J et al. (2006) Effects of anesthetics on mutant N-methyl-D-aspartate receptors expressed in Xenopus oocytes — Journal of pharmacology and experimental therapeutics PMID:16622040
  2. [2]
    ^Branda EM, Ramza JT, Cahill FJ, Tseng LF, Quock RM (2000) Role of brain dynorphin in nitrous oxide antinociception in mice — Pharmacology, biochemistry, and behavior PMID:10672972
  3. [3]
    ^Koyama T et al. (2009) Deletion of mu-opioid receptor in mice does not affect the minimum alveolar concentration of volatile anaesthetics and nitrous oxide-induced analgesia — British Journal of Anaesthesia doi:10.1093/bja/aep246
  4. [4]
    ^Brunt TM, van den Brink W, van Amsterdam J (2022) Mechanisms Involved in the Neurotoxicity and Abuse Liability of Nitrous Oxide: A Narrative Review — International Journal of Molecular Sciences doi:10.3390/ijms232314747
  5. [5]
    ^Oussalah A et al. (2019) Global Burden Related to Nitrous Oxide Exposure in Medical and Recreational Settings: A Systematic Review and Individual Patient Data Meta-Analysis — Journal of Clinical Medicine doi:10.3390/jcm8040551
  6. [6]
    ^Wang S et al. (2024) Nitrous oxide induced subacute combined degeneration of the spine cord: A case report — Medicine doi:10.1097/md.0000000000037032
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