Nitrous oxide (N2O), commonly known as laughing gas, is a colorless, sweet-tasting gas with a dual identity as both a widely used medical anesthetic and one of the oldest recreational psychoactive substances. Its psychoactive properties were first systematically documented by the English chemistHumphry Davy in 1799 at the Pneumatic Institution in Bristol, where he conducted extensive self-experimentation and described experiences of giddiness, intense pleasure, and "sublime emotion connected with highly vivid ideas." Davy famously invited poets including Samuel Taylor Coleridge and Robert Southey to participate in inhalation experiments — establishing what may have been the first recreational drug scene in modern Western history .
In medical settings, nitrous oxide has been a mainstay of dental and surgical anesthesia for over 175 years, valued for its rapid onset, short duration, and wide margin of safety when administered with adequate oxygen. Recreationally, N2O is most commonly accessed through whipped cream charger cartridges ("whippets") or, more recently, larger industrial-grade tanks — a pattern of use that has expanded significantly in recent decades .
The pharmacology of nitrous oxide is remarkably complex for such a simple molecule. Its primary mechanism is NMDA receptor antagonism — blocking glutamate's excitatory action, which it shares with dissociatives like ketamine. However, N2O also modulates theendogenous opioid system (triggering release of endorphin and enkephalin peptides), enhancesGABA-A receptor activity (contributing to anxiolytic effects resembling benzodiazepines), and may interact with additional targets . This multi-receptor polypharmacology accounts for its unique subjective profile: a brief, intense state combining euphoria, dissociation, auditory distortions, and sometimes profound altered states — all lasting under 60 seconds from a single inhalation.
The chief chronic-use concern is vitamin B12 (cobalamin) inactivation. Nitrous oxide irreversibly oxidizes the cobalt atom in B12, disabling methionine synthase and potentially causing subacute combined degeneration of the spinal cord — a serious neurological condition involving peripheral neuropathy, weakness, and myelopathy that can become permanent if unrecognized .
References
Davy H. Researches, Chemical and Philosophical; Chiefly Concerning Nitrous Oxide. London: J. Johnson; 1800. Jay M. The atmosphere of heaven: The unnatural experiments of Dr. Humphry Davy and his circle. Yale University Press; 2009. FDA. FDA Advises Consumers Not to Inhale Nitrous Oxide Products. 2025. Jevtovic-Todorovic V et al. Nitrous oxide (laughing gas) is an NMDA antagonist, neuroprotectant and neurotoxin. Nat Med. 1998;4(4):460-463. Emmanouil DE, Quock RM. Advances in understanding the actions of nitrous oxide. Anesth Prog. 2007;54(1):9-18. Garakani A et al. Neurological and neuropsychiatric effects of nitrous oxide misuse. JAMA Neurol. 2016;73(10):1277.
Safety at a Glance
High Risk- Toxicity: Toxicity Profile Nitrous oxide is generally considered to have a wide margin of acute safety when used with adequate ...
- Dangerous with: Desomorphine, Naloxone
- Overdose risk: Fatal nitrous oxide overdose is primarily caused by asphyxiation (displacement of oxygen) rather ...
- Start with a low dose and wait for onset before redosing
If someone is in crisis, call 911 or Poison Control: 1-800-222-1222
Dosage
inhaled
Duration
inhaled
Total: 1 min – 5 minHow It Feels
The onset of nitrous oxide is almost instantaneous, arriving within seconds of inhalation as a warm, enveloping wave that seems to simultaneously soften the body and expand the mind. Sound changes first and most dramatically: a characteristic oscillating drone emerges, often described as a wah-wah or wub-wub sound that seems to pulse in rhythm with the heartbeat and rapidly accelerates. This auditory effect is so distinctive and consistent that it serves as the substance's unmistakable signature. The body feels suddenly weightless, as though gravity has been dialed down, and a powerful euphoria blooms from the center of the chest outward.
At the peak, which arrives within thirty to sixty seconds, the experience can become remarkably intense despite its brevity. The oscillating sound reaches a crescendo, visual perception may tunnel or fragment, and there is frequently a profound sense of revelation or understanding, a feeling that some fundamental truth about reality is on the verge of being grasped. This sense of cosmic significance is so common it has its own informal name among users. The body feels dissolved into the sound and sensation, and boundaries between self and environment blur momentarily. At higher doses or in combination with other substances, full dissociation is possible, where awareness of the physical body and surroundings drops away entirely for a few seconds.
The return to baseline is as rapid as the onset. Within one to three minutes, the oscillating sound fades, the euphoria gently deflates, and normal perception reassembles itself. There is often a brief moment of confusion or disorientation followed by laughter, as the intensity of the experience contrasts sharply with its brevity and the mundane reality to which one returns. A residual warmth and lightness may persist for several minutes. The clarity of thought returns quickly, and the memory of what felt like a profound insight typically dissolves into something frustratingly inarticulable.
The extreme brevity and apparent harmlessness of each individual use can be deceptive. The rapid onset-offset cycle creates a strong compulsive redosing pattern for some users, particularly when a supply is readily available. Repeated back-to-back use without adequate oxygen between inhalations poses genuine risks of hypoxia and loss of consciousness. Chronic heavy use depletes vitamin B12, which can lead to serious and potentially irreversible nerve damage. The substance is safest when used infrequently, with adequate breathing between doses, and never while standing or in a position where a brief loss of consciousness could result in a fall.
Subjective Effects
The effects listed below are based on the Subjective Effect Index (SEI), an open research literature based on anecdotal reports and personal analyses. They should be viewed with a healthy degree of skepticism. These effects will not necessarily occur in a predictable or reliable manner, although higher doses are more liable to induce the full spectrum of effects.
Physical Effects
Physical(11)
- Changes in felt bodily form— Changes in felt bodily form is the experience of one's body feeling as though it has altered its phy...
- Dizziness— A sensation of spinning, swaying, or lightheadedness that impairs balance and spatial orientation, o...
- Headache— A painful sensation of pressure, throbbing, or aching in the head that can range from a dull backgro...
- Laughter fits— Spontaneous, uncontrollable, and often prolonged episodes of intense laughter that erupt without any...
- Motor control loss— A distinct decrease in the ability to control one's physical body with precision, balance, and coord...
- Pain relief— A suppression of negative physical sensations such as aches and pains, ranging from dulled awareness...
- Perception of bodily lightness— Perception of bodily lightness is the subjective feeling that one's body has become dramatically lig...
- Physical disconnection— A perceptual distancing from one's own physical body that ranges from a subtle sense of numbness or ...
- Physical euphoria— An intensely pleasurable bodily sensation that can manifest as waves of warmth, tingling electricity...
- Sedation— A state of deep physical and mental calming that manifests as a progressive desire to remain still, ...
- Vasodilation— Vasodilation is the relaxation and widening of blood vessels, leading to increased blood flow, reduc...
Tactile(2)
- Tactile distortion— Tactile distortion is the warping of existing touch and body sensations — textures may feel alien, p...
- Tactile suppression— A progressive decrease in the ability to feel physical touch, ranging from mild numbness to complete...
Cognitive & Perceptual Effects
Visual(9)
- Colour suppression— A visual effect in which the perceived saturation and vibrancy of colors is diminished, causing the ...
- Double vision— The visual experience of seeing a single object as two separate, overlapping images, similar to cros...
- Drifting— The visual experience of perceiving stationary objects, textures, and surfaces as appearing to flow,...
- External hallucination— A visual hallucination that manifests within the external environment as though it were physically r...
- Field of view alteration— A distortion in the apparent breadth or shape of one's visual field, ranging from an expanded, panor...
- Frame rate suppression— Perception of visual motion as choppy discrete frames rather than smooth continuous flow, resembling...
- Geometry— The experience of perceiving complex, ever-shifting geometric patterns superimposed over the visual ...
- Internal hallucination— Vivid, detailed visual experiences perceived within an imagined mental landscape that can only be se...
- Visual agnosia— A dissociative visual-cognitive effect in which the observer can physically see objects with normal ...
Cognitive(15)
- Amnesia— A complete or partial inability to form new memories or recall existing ones during and after substa...
- Analysis suppression— Analysis suppression is a cognitive impairment in which the capacity for logical reasoning, critical...
- Anxiety— Intense feelings of apprehension, worry, and dread that can range from a subtle background unease to...
- Anxiety suppression— A partial to complete suppression of anxiety and general unease, producing a calm, relaxed mental st...
- Cognitive euphoria— A cognitive and emotional state of intense well-being, elation, happiness, and joy that manifests as...
- Compulsive redosing— An overwhelming, difficult-to-resist urge to continuously take more of a substance in order to maint...
- Confusion— An impairment of abstract thinking marked by a persistent inability to grasp or comprehend concepts ...
- Deja vu— Intense, often prolonged sensation of having already experienced the current moment, common with psy...
- Depersonalization— A detachment from one's own sense of self, body, or mental processes, as if observing oneself from o...
- Derealization— A perceptual disturbance in which the external world feels profoundly unreal, dreamlike, or artifici...
- Increased sense of humor— A general amplification of one's sensitivity to finding things humorous and amusing, often causing p...
- Jamais vu— Jamais vu is the unsettling experience of encountering something deeply familiar — a word, a place, ...
- Memory suppression— A dose-dependent inhibition of one's ability to access and utilize short-term and long-term memory, ...
- Suggestibility enhancement— Heightened receptivity to external suggestions, ideas, and influence, commonly experienced during ps...
- Thought deceleration— The experience of thoughts occurring at a markedly reduced pace, as if the mind has been placed into...
Auditory(1)
- Auditory distortion— Auditory distortion is the experience of sounds becoming warped, pitch-shifted, flanged, or otherwis...
Multi-sensory(2)
- Olfactory suppression— Olfactory suppression (hyposmia or anosmia) is the diminishment or complete loss of smell perception...
- Synaesthesia— Stimulation of one sense triggers involuntary experiences in another — seeing sounds as colors, tast...
Transpersonal(3)
- Ego death— A profound dissolution of the sense of self in which personal identity, memories, and the boundary b...
- Perception of interdependent opposites— Perception of interdependent opposites is the profound, felt realization that reality is structured ...
- Unity and interconnectedness— A profound sense that identity extends beyond the self to encompass other people, nature, or all of ...
Pharmacology
Nitrous oxide (N2O) exerts its psychoactive effects primarily through non-competitive antagonism of NMDA (N-methyl-D-aspartate) glutamate receptors, placing it in the same broad pharmacological family as ketamine, PCP, and memantine. By blocking the ion channel associated with NMDA receptors, nitrous oxide reduces excitatory glutamatergic neurotransmission, which is the principal mechanism underlying its dissociative, analgesic, and anxiolytic properties. This NMDA antagonism is thought to trigger a downstream surge in glutamate release in certain brain regions, which paradoxically increases activity at non-NMDA glutamate receptors (particularly AMPA receptors) and may contribute to the brief but intense euphoric and perceptual effects users report.
Beyond NMDA antagonism, nitrous oxide interacts with several other neurochemical systems. It potentiates GABA-A receptor activity, contributing to its anxiolytic and sedative effects. It stimulates the endogenous opioid system, which accounts for a significant portion of its analgesic properties -- studies have shown that the opioid antagonist naloxone can partially block nitrous oxide analgesia. There is also evidence of interaction with the nitric oxide (NO) signaling pathway, though nitrous oxide (N2O) and nitric oxide (NO) are distinct molecules; the former may influence NO synthase activity in ways that affect vasodilation and neuronal signaling, though this interaction is less well characterized than its NMDA effects.
The most pharmacokinetically distinctive feature of nitrous oxide is the extreme rapidity of its onset and offset, which is a direct consequence of its physical properties as a gas. When inhaled, N2O crosses the alveolar membrane into the bloodstream almost instantaneously due to its high blood-gas partition coefficient and rapid diffusion kinetics. It reaches effective brain concentrations within 15 to 30 seconds. Equally important, elimination is almost entirely through exhalation -- the gas is not significantly metabolized by the body. Once inhalation ceases, the rapid diffusion gradient reverses, and N2O is exhaled within 2 to 5 minutes, which is why the subjective effects fade so quickly and completely. This pharmacokinetic profile -- essentially a square wave of drug exposure -- is unique among recreational substances and explains both the appeal (brief, controllable experience) and the risk pattern (compulsive redosing due to the rapid offset).
The most significant chronic toxicity concern with nitrous oxide is its irreversible oxidation of the cobalt atom in vitamin B12 (cobalamin), rendering the vitamin biologically inactive. B12 is an essential cofactor for methionine synthase, which is required for myelin synthesis and DNA methylation. With repeated or heavy use, B12 stores become depleted, leading to functional B12 deficiency even when dietary intake is adequate. The clinical manifestation is a subacute combined degeneration of the spinal cord -- a demyelinating condition presenting as peripheral neuropathy (numbness, tingling, weakness in extremities), ataxia, and in severe cases, paralysis. This damage can be permanent if use continues after neurological symptoms appear. Users who consume nitrous oxide more than occasionally should supplement with B12 and should stop use immediately if any neurological symptoms develop.
Acute risks center on oxygen displacement. Because nitrous oxide is inhaled in place of ambient air, any delivery method that restricts access to oxygen (such as masks, bags over the head, or confined spaces) can cause hypoxia, loss of consciousness, and death. When used from pressurized cartridges via a balloon -- the standard harm reduction method -- oxygen displacement is transient and self-correcting as the user resumes breathing room air between inhalations.
Detection Methods
Nitrous oxide is extremely difficult to detect through drug testing. It is not metabolized by the body and is excreted unchanged through exhalation, leaving no metabolites to detect in urine or blood. It is not included in any standard drug panels. The gas itself can only be detected in breath or blood samples collected during or immediately after use.
Indirect evidence of chronic nitrous oxide use can be obtained by measuring vitamin B12 levels, homocysteine levels (elevated in B12 deficiency), and methylmalonic acid levels (elevated in B12 deficiency). These biomarkers indicate B12 inactivation but are not specific to nitrous oxide use, as B12 deficiency can have other causes.
There are no reagent tests applicable to nitrous oxide, as it is used in its gaseous form. The purity of medical and food-grade nitrous oxide is generally reliable, though industrial-grade nitrous oxide (intended for automotive use) may contain impurities including sulfur dioxide and should not be inhaled.
Interactions
| Substance | Status | Note |
|---|---|---|
| Desomorphine | Dangerous | Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration |
| Naloxone | Dangerous | Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration |
| 3-Cl-PCP | Caution | Compounding dissociative effects can cause confusion, mania, and loss of motor control |
| 3-HO-PCE | Caution | Compounding dissociative effects can cause confusion, mania, and loss of motor control |
| 3-HO-PCP | Caution | Compounding dissociative effects can cause confusion, mania, and loss of motor control |
| 3-MeO-PCE | Caution | Compounding dissociative effects can cause confusion, mania, and loss of motor control |
| 3-MeO-PCMo | Caution | Compounding dissociative effects can cause confusion, mania, and loss of motor control |
| Acetylfentanyl | Uncertain | — |
| Alcohol | Uncertain | — |
| Buprenorphine | Uncertain | — |
| Codeine | Uncertain | — |
| Dextropropoxyphene | Uncertain | — |
History
Nitrous oxide gas was first synthesized in 1772 by English natural philosopher and chemist Joseph Priestley. He published his findings in the book Experiments and Observations on Different Kinds of Air (1775), describing the synthesis of the gas by heating iron filings dampened with nitric acid. In 1800, Humphry Davy, an assistant at the Pneumatic Institute, published a book about nitrous oxide in 1800. In the book, there is the following passage;
"As nitrous oxide in its extensive operation appears capable of destroying physical pain, it may probably be used with advantage during surgical operations where too great an effusion of blood does not take place." Davy notes the analgesic effect of nitrous oxide and its potential for use in surgical operations. Davy coined the name "laughing gas" for nitrous oxide. Beginning in 1799, nitrous oxide was used as a recreational drug at "laughing gas parties". They became an immediate success within the British upper class. Despite Davy's discovery of nitrous' potential for anesthesia, doctors did not attempt to use it for nearly half a decade.
The discovery of ether in 1830 led nitrous to fall out of popularity as a recreational drug. It was not until 1844 that American dentist Horace Wells noticed the anesthetic properties of the gas. With the assistance of Gardner Quincy Colton and John Mankey Riggs, he demonstrated insensitivity to pain during a tooth extraction. The practice was not immediately adopted by other dentists, as Wells' first public demonstration had been partly unsuccessful. In 1863, Gardner Quincy Colton began to administer the gas to patients in all of his "Colton Dental Association" clinics, administering nitrous oxide to over 25,000 patients over three years. This brought the practice into general use.
Nitrous oxide was not found to be a strong enough anesthetic for major surgeries in hospital settings, but it became useful as an initiator for stronger anesthetics like ether or chloroform. Hospitals would initiate treatment with a mild flow of nitrous oxide, and then gradually increase the flow of the stronger anesthetic. This technique of initiating anesthesia is still used in hospitals today.
Nitrous is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.
Harm Reduction
The most critical safety rule for nitrous oxide is to never inhale directly from a pressurized tank or cartridge, as the high-pressure gas can cause lung damage and the extreme cold can cause frostbite to the mouth, throat, and airways. Always discharge nitrous oxide into a balloon first and inhale from the balloon. Never use plastic bags over the head, as oxygen deprivation combined with loss of consciousness can cause suffocation and death.
Always use nitrous oxide while seated or lying down, as sudden loss of consciousness upon standing can cause falls and head injuries. Falls are one of the most common sources of nitrous oxide-related injury. Never use nitrous oxide while driving, near open flames, or near water.
The most significant long-term risk of nitrous oxide is vitamin B12 depletion through inactivation of B12-dependent enzymes (methionine synthase). Chronic heavy use can cause subacute combined degeneration of the spinal cord, presenting as numbness and tingling in the extremities, difficulty walking, muscle weakness, and in severe cases, paralysis. B12 supplementation does not adequately protect against this if use is heavy and frequent. The only reliable protection is limiting frequency of use. Occasional use (once per month or less) is unlikely to cause B12-related damage. Daily or weekly heavy use creates significant risk. If neurological symptoms develop, cease use immediately and seek medical attention.
Toxicity & Safety
Toxicity Profile
Nitrous oxide is generally considered to have a wide margin of acute safety when used with adequate oxygen supply — its LD50 in animal models is essentially unobtainable because the gas itself is not directly toxic at concentrations that maintain adequate oxygenation. However, chronic recreational use introduces serious risks that are frequently underestimated by users.
Vitamin B12 Inactivation (The Critical Risk)
The most significant toxicity of repeated nitrous oxide exposure is its irreversible oxidation of vitamin B12 (cobalamin). N2O converts the cobalt ion in B12 from its active Co(I) state to inactive Co(III), disabling two critical enzymes:methionine synthase (which converts homocysteine to methionine and regenerates tetrahydrofolate) andmethylmalonyl-CoA mutase (involved in fatty acid metabolism) .
The downstream consequences are devastating to the nervous system:
- Demyelination: Methionine is essential for producing S-adenosylmethionine (SAMe), the methyl donor required for myelin protein synthesis. Without it, the myelin sheaths that insulate nerve fibers degrade.
- Subacute combined degeneration of the spinal cord: The hallmark neurological injury of chronic N2O use. Patients develop progressive sensory neuropathy (tingling, numbness in extremities), weakness, gait ataxia, and proprioceptive loss. MRI characteristically shows T2 hyperintensity in the posterior columns of the spinal cord .
- Peripheral neuropathy: Often the earliest symptom — bilateral paresthesias in hands and feet, sometimes described as "glove and stocking" distribution.
- Cognitive impairment: Memory deficits, confusion, and in severe cases, psychosis.
Critically, standard serum B12 levels may appear normal despite functional B12 deficiency. Diagnosis requires measuringmethylmalonic acid and homocysteine levels, which are elevated when B12-dependent enzymes are impaired. In one case series, 29.3% of patients with neurological symptoms from N2O had normal serum B12 levels .
Recovery requires B12 supplementation and complete cessation of N2O use. While many patients improve, some neurological damage can be permanent, particularly if diagnosis is delayed. Individuals with pre-existing B12 deficiency (vegans, those with pernicious anemia, those on metformin or PPIs) are at significantly elevated risk.
Oxygen Displacement and Asphyxiation
Inhaling 100% nitrous oxide displaces breathable oxygen. In open-air use (e.g., from a balloon), the risk of hypoxia is brief and self-limiting because the user will drop the balloon upon losing consciousness. However, enclosed space use — including use with masks, bags, or in poorly ventilated areas — can cause fatal asphyxiation. Deaths have been reported from individuals placing bags over their heads or using industrial tanks in closed vehicles .
Frostbite
Nitrous oxide exits pressurized containers at temperatures below -40 degrees F (-40 degrees C). Direct inhalation from charger cartridges or tanks without a dispenser can cause severe frostbite to the lips, oral cavity, pharynx, and upper airway. Case reports document cold-induced injuries requiring hospitalization .
Falls and Acute Injury
The brief but intense dissociative and motor-impairing effects of N2O create a fall risk, particularly when inhaled while standing. Fractures, lacerations, and head injuries from falls during acute intoxication are a recognized pattern in emergency department presentations.
Hematological Effects
Chronic exposure can cause megaloblastic anemia through impaired DNA synthesis (via folate trapping). Bone marrow suppression with prolonged heavy use has been documented in case reports.
References
Sanders RD et al. Biologic effects of nitrous oxide: a mechanistic and toxicologic review. Anesthesiology. 2008;109(4):707-722. Vasconcelos OM et al. Nitrous oxide-induced vitamin B12 deficiency resulting in myelopathy. Cureus. 2020;12(7):e9088. Thompson AG et al. Subacute combined degeneration of the spinal cord from recreational nitrous oxide use. BMJ Case Rep. 2015;2015:bcr2015209443. Chiang TT et al. Nitrous oxide myelopathy with functional vitamin B12 deficiency. Pract Neurol. 2019;19(1):89-92. Randhawa G, Birdi S. Deaths from asphyxia and recreational use of nitrous oxide. J Forensic Sci. 2019;64(5):1549-1551. Fadaee N et al. A chilling risk: Frostbite from recreational nitrous oxide. NEJM. 2025.
Addiction Potential
Mildly to moderately addictive. The very short duration of action can promote compulsive re-dosing in a single session. Psychological dependence can develop in chronic users. Physical dependence is minimal. The ease of access and legal status contribute to abuse patterns.
Overdose Information
Fatal nitrous oxide overdose is primarily caused by asphyxiation (displacement of oxygen) rather than direct toxicity. Deaths have occurred from using nitrous oxide in enclosed spaces, from placing bags or masks over the head, or from inhaling directly from high-pressure tanks. The gas itself has relatively low toxicity when adequate oxygen is maintained.
Signs of dangerous nitrous oxide use include: loss of consciousness (beyond the brief normal dissociation), blue-tinged lips or fingernails (cyanosis indicating oxygen deprivation), seizures, confusion persisting beyond a few minutes after the last inhalation, and symptoms of vitamin B12 deficiency (numbness, tingling, difficulty walking) indicating chronic nerve damage.
If someone loses consciousness from nitrous oxide, move them to fresh air immediately. Check breathing and pulse. If not breathing, begin rescue breathing or CPR and call emergency services (911). If they regain consciousness, monitor for confusion and disorientation. For chronic users showing neurological symptoms, seek medical attention promptly, as B12-related nerve damage is partially reversible if caught early but can become permanent if use continues. Good Samaritan laws apply.
Dangerous Interactions
The combinations listed below may be life-threatening. Independent research should always be conducted to ensure safety when combining substances.
Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Tolerance
| Full | develops with prolonged and repeated use |
| Half | 3 - 7 days |
| Zero | 1 - 2 weeks |
Cross-tolerances
Legal Status
Germany: Nitrous oxide is not a controlled substance under the BtMG (Narcotics Act) or the NpSG (New Psychoactive Substances Act). It is legal, as long as it is not sold for human consumption, according to §2 AMG. If it is intended for medical use, it is classified as a prescription medicine.
India: Nitrous oxide is available for general anesthesia purposes. India's gas cylinder rules (1985) permit the transfer of gas from one cylinder to another for breathing purposes.
Netherlands: Sign stating "forbidden to use nitrous oxide" in the Poelestraat in Groningen, Netherlands, which is also known as the main nightlife area with bars, pubs, and clubs. Since 1 January 2021 has the use of nitrous oxide in the area been prohibited. Since 1 January 2023, the possession, importing, and sale of nitrous oxide is banned in the Netherlands, with exceptions for medical use, and the food industry. It is illegal under the Opium Act.
New Zealand: Nitrous oxide is a prescription medicine, and its sale or possession without a prescription is an offense under the Medicines Act.
Sweden: From July 1, 2025, Sweden will restrict nitrous oxide sales with an 18-gram (two whipped-cream chargers) limit per purchase, an 18-year age minimum, and tighter controls on import and marketing. Violations may lead to fines or up to six months in prison.
United Kingdom: Nitrous Oxide is a class C drug under the Misuse of Drugs Act as of 8th November 2023. It is still permitted for use within the medical and food industries.
United States: Possession of nitrous oxide is legal under federal law and is not subject to DEA purview. It is, however, regulated by the Food and Drug Administration under the Food Drug and Cosmetics Act. Prosecution is possible under its "misbranding" clauses, prohibiting the sale or distribution of nitrous oxide for the purpose of human consumption. Many states have laws regulating the possession, sale, and distribution of nitrous oxide. Such laws usually ban distribution to minors or limit the amount of nitrous oxide that may be sold without a special license. For example, in the state of California possession for recreational use is prohibited and qualifies as a misdemeanor.
Experience Reports (3)
Tips (10)
Always breathe fresh air between nitrous balloons. Oxygen deprivation, not nitrous itself, causes most acute harm. Never use nitrous with a bag over your head or in an enclosed space. Use a balloon as your delivery method, never inhale directly from a dispenser.
Supplement with vitamin B12 if you use nitrous oxide, even occasionally. Never use nitrous continuously; take breaks between balloons to breathe normal air. Oxygen deprivation causes brain damage.
If insufflating Nitrous, start with a small bump and wait 15-20 minutes to assess effects before taking more. Onset via insufflation is faster than oral, but full effects still take time to manifest.
Always sit or lie down when using nitrous. Loss of motor control and brief loss of consciousness can occur. Standing while using nitrous has caused serious head injuries from falls.
Chronic nitrous oxide use depletes vitamin B12 and causes severe nerve damage (subacute combined degeneration). Symptoms include tingling, numbness, and difficulty walking. This damage can be permanent.
Nitrous combined with psychedelics like LSD can produce intensely powerful experiences, including vivid visuals of interconnected lines between objects and profound altered states. Start with a single balloon if combining, as the synergy is much stronger than either substance alone.
Community Discussions (8)
Further Reading
Ketamine & Depression: From Anesthetic to Antidepressant
Ketamine's rapid antidepressant effects, discovered serendipitously in the 1990s, have transformed our understanding of depression and led to the first fundamentally new class of antidepressants in decades.
Read articleKetamine Therapy: How It Works, What to Expect & Side Effects
Ketamine therapy is being used to treat depression, PTSD, anxiety, and chronic pain. This guide covers how therapeutic ketamine works, the different administration routes (IV infusion, nasal spray, sublingual), what a session feels like, common side effects, risks, costs, and harm reduction considerations.
Read articleSee Also
References (5)
- Nitrous Vault - Erowid
Erowid experience vault for Nitrous
erowid - Ketamine as a rapid antidepressant — Berman et al. Biological Psychiatry (2000)paper
- PubChem: Nitrous
PubChem compound page for Nitrous (CID: 948)
pubchem - Nitrous - TripSit Factsheet
TripSit factsheet for Nitrous
tripsit - Nitrous - Wikipedia
Wikipedia article on Nitrous
wikipedia
Gallery