NM-2-AI
N-methyl-2-aminoindane
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NM-2-AI (N-methyl-2-aminoindane) is a synthetic stimulant of the aminoindane class. It is a structurally rigid structural analog of methamphetamine — shorter-acting and lower in potency. It works by flooding synapses with norepinephrine, producing driven alertness and physical activation.[1][2]
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NM-2-AI appeared on research chemical markets around 2009–2010, marketed as a legal alternative following bans on mephedrone and other synthetic cathinones.[3] It circulated briefly before fading from vendor catalogs, though forensic detections continued into the early 2020s.[4] It remains unscheduled under international drug control conventions,[5] though several countries cover it through blanket new psychoactive substance laws.
Subjective effects include physical stimulation, wakefulness, sharpened focus, and mild euphoria. The experience is stimulant-forward — a driven, alert push without the emotional warmth or social connection characteristic of serotonin-releasing aminoindanes like MDAI.[6] Compulsive redosing is a characteristic pattern driven by short duration and rapid offset; higher doses bring anxiety, restlessness, and post-session irritability.
Dependence potential is moderate, and computational modeling predicts an 82% probability of cardiovascular toxicity.[7] One death has been documented in a polydrug context,[4] and combining NM-2-AI with MAOIs or other serotonergic drugs risks fatal blood pressure crisis and dangerous overheating. No controlled human study has been published — the profile rests on structural analogy, one mouse study, and community reports.
History[edit]
History
Discovery
The 2-aminoindane scaffold was first studied pharmacologically in the 1970s–1980s, with sympathomimetic properties identified for the N-methyl variant by 1980.[8] David Nichols developed ring-substituted aminoindanes — most notably MDAI — as non-neurotoxic alternatives to MDMA, demonstrating that the indane scaffold could separate entactogenic effects from neurotoxic liability.[9][10] NM-2-AI itself has no identified original publication.
Market emergence and surveillance
NM-2-AI appeared on research chemical markets around 2009–2010 following bans on synthetic cathinones.[3] Italian forensic labs identified it in seized materials between 2013 and 2015.[11] In 2021, the DEA issued a formal alert after the compound was confirmed in a 2015 Iowa overdose death, with seven additional suspected exposures reported between 2020 and 2021.[4]
"NM-2-AI" is a chemical shorthand: N-methyl (NM) at the 2-aminoindane (2-AI) position. The compound has no established street names. Tirri et al. described it as "briefly used in the illicit drug market",[6] and its reputation among research chemical users is that of a marginal stimulant — functional but unremarkable, overshadowed by more potent or empathogenic alternatives in the aminoindane family.
Chemistry[edit]
Chemistry
Structural class
NM-2-AI belongs to the aminoindane class within the broader phenethylamine family. Its defining feature is the indane ring system — a five-membered ring fused to benzene — which locks the methamphetamine-like backbone into a rigid shape. It carries a methyl group on the nitrogen at the ring's 2-position and no aromatic substitution, which distinguishes it from entactogenic aminoindanes like MDAI.
Molecular properties
Its molecular formula is C₁₀H₁₃N (molecular weight 147.22 g/mol). Two CAS registry numbers appear in the literature, likely distinguishing the free base from the hydrochloride salt.[7][12] It has a single chirality center and is presumed to circulate as a racemic mixture.citation needed
Pharmacology[edit]
Pharmacology
Mechanism of action
NM-2-AI works by reversing the NET — forcing norepinephrine out of neurons without a nerve signal, flooding synapses.[1] No direct measurement of NM-2-AI's transporter activity has been published.[3] The profile is inferred from its parent compound 2-aminoindane, which acts mainly on the norepinephrine transporter with weaker dopamine involvement and minimal serotonin activity.[1][2]
Some sources classify NM-2-AI as a dopamine and serotonin releaser, but the evidence points toward norepinephrine dominance. Ring substitution is what shifts aminoindane selectivity toward serotonin;[2] without it, NM-2-AI behaves more like a noradrenergic stimulant.[13] Tirri et al. documented entactogenic-like behavior in mice,[6] but whether this reflects serotonin activity remains unresolved.
Pharmacokinetics
NM-2-AI is broken down in the liver, primarily to 2-aminoindane (2-AI) — itself pharmacologically active and identified as the main active metabolite.[6] Seven metabolites have been identified in rat urine.[14] The enzyme that clears 2-AI (NAT2) varies genetically, meaning some people may be exposed to the active metabolite for longer than others.[15]
Neuroscience[edit]
Neuroscience
No direct neuroimaging or neurochemical measurement data exist for NM-2-AI. The following is inferred from its presumed norepinephrine-releasing pharmacology.
Where it acts
As a norepinephrine-dominant compound, NM-2-AI amplifies signaling from the brain's alertness system outward to the prefrontal cortex and amygdala. Moderate norepinephrine elevation sharpens attention and working memory — consistent with the focus users report. Excessive activation tips this into anxiety, elevated heart rate, and restless overstimulation.
Why it matters
If secondary dopamine activity is present,[2] it engages the brain's mesolimbic pathway — explaining mild euphoria and redosing pressure. Tirri et al. found that NM-2-AI's effects in mice "appear atypical and less intense with respect to those induced by classic stimulants".[6] This pattern fits the community description: stimulating but emotionally shallow.
The core unanswered question is whether NM-2-AI has any meaningful SERT activity. The mild entactogenic quality some users describe could reflect low-level serotonin activity, noradrenergic modulation of oxytocin, or simple misattribution.
Subjective Effects[edit]
Subjective Effects
NM-2-AI produces a driven, alert, physically activated state. Wakefulness, sharpened focus, and a restless push toward activity dominate. The character is brisk and task-oriented rather than warm or expansive, and the margin between stimulating and uncomfortably overstimulating is narrow.
The experience sits closer to a low-potency stimulant than to an entactogen. Compared to MDMA, emotional warmth and sensory depth are largely absent. Compared to its parent compound 2-ai, the N-methyl group appears to increase potency while preserving the same qualitative character.[6]
Effect Grid
At 100–150 mg oral, NM-2-AI delivers its core stimulant profile: pronounced wakefulness, physical stimulation, and noticeable thought acceleration. Appetite suppression becomes reliable. Mild euphoria emerges, though attenuated compared to dopamine-dominant stimulants. Some users report faint prosocial warmth at the upper end of this range, but empathogenic depth remains limited.
Physical effects include increased heart rate, mild bruxism, excessive sweating, and dehydration sensation. Cardiovascular activation is perceptible. Nausea may occur during onset but typically resolves as stimulation builds.
The short duration (2–4 hours) creates pressure toward compulsive redosing. Post-acute cognitive fatigue, low mood, and irritability are common as effects wane.
Modeled from the effect's dose-dependence curve — not per-substance measurements.
Sound sensitivity · Visual processing acceleration · Color enhancement
Pupil dilation · Appetite suppression · Body high · Dry mouth · Muscle tension · Excessive sweating · Dehydration sensation · Heart rate perception changes · Insomnia · Physical fatigue · Restlessness · Spontaneous body sensations · Tactile euphoria · Bruxism · Bodily lightness · Breathing alteration · Respiratory stimulation · Tingling / electric sensations · Vibrations / buzzing · Nausea · Sexual arousal suppression · Dizziness · Headache · Involuntary body movements · Laughter fits · Sexual arousal enhancement · Nystagmus (eye wobbles) · Trembling · Vomiting
Muscle tension · Excessive sweating · Dehydration sensation · Heart rate perception changes · Insomnia · Physical fatigue · Restlessness · Spontaneous body sensations · Tactile euphoria · Bruxism · Bodily lightness · Breathing alteration · Respiratory stimulation · Tingling / electric sensations · Vibrations / buzzing · Nausea · Sexual arousal suppression · Dizziness · Headache · Involuntary body movements · Laughter fits · Sexual arousal enhancement · Nystagmus (eye wobbles) · Trembling · Vomiting
Openness enhancement · Motivation enhancement · Analysis enhancement · Aesthetic enhancement · Cognitive flexibility · Conceptual thinking · Focus enhancement · Humor enhancement · Immersion enhancement · Information processing enhancement · Introspection enhancement · Novelty enhancement · Pattern recognition enhancement · Thought connectivity · Creativity enhancement · Language enhancement · Thought organization · Motivation suppression · Cognitive dysphoria · Increased nature relatedness · Memory replays · Memory enhancement · Thought deceleration
Cognitive flexibility · Conceptual thinking · Focus enhancement · Humor enhancement · Immersion enhancement · Information processing enhancement · Introspection enhancement · Novelty enhancement · Pattern recognition enhancement · Thought connectivity · Creativity enhancement · Language enhancement · Thought organization · Motivation suppression · Cognitive dysphoria · Increased nature relatedness · Memory replays · Memory enhancement · Thought deceleration
Irritability · Anxiety · Anxiety suppression · Emotional lability · Simultaneous emotions · Anhedonia · Catharsis · Dysphoria · Emotional suppression · Empathy suppression · Paranoia
Emotional lability · Simultaneous emotions · Anhedonia · Catharsis · Dysphoria · Emotional suppression · Empathy suppression
Communication enhancement · Sociability enhancement · Craving · Emotional susceptibility · Flow state · Ego inflation · Depersonalization · Derealization · Boundary dissolution
Flow state · Ego inflation · Depersonalization · Derealization · Boundary dissolution
Timeline
Gradual stimulant awareness emerges — subtle alertness increase, possible mild nausea. Cardiovascular activation is not yet perceptible.
Rising stimulation with increasing heart rate awareness and mood elevation. Appetite suppression begins. Physical energy builds noticeably.
Maximum stimulation and mild euphoria. Thought acceleration, wakefulness, and cardiovascular activation at their strongest. Bruxism and sweating most pronounced.
Rapid decline in stimulation. Emerging fatigue, irritability, and low mood as monoamine stores deplete. Compulsive redosing urge is strongest during this phase.
Post-acute fatigue, cognitive fog, possible depressed mood, and appetite return. Residual insomnia may persist.
⚠ Do not drive or operate heavy machinery for at least 4 hours after dosing due to residual cognitive impairment and potential fatigue.
Safety[edit]
- Acute toxicity
- Moderate
- Chronic toxicity
- Low
- Withdrawal
- Mild
- Tolerance buildup
- moderate
- Tolerance reset
- 10 days
- Physical
- Low
- Psychological
- Moderate
- Compulsive redosing
- High
- Dose escalation
- Moderate
- Cross-tol.
- dopaminergic stimulants · other monoamine releasing agents
Toxicity
Predicted toxicity
No experimental lethal dose has been established for NM-2-AI in any species. Computational modeling predicts an 82% probability of cardiovascular toxicity, a 65% probability of pulmonary involvement, and a 66.3% probability of mutagenicity — higher than the parent compound 2-AI.[7]
Structural analog toxicology
MDAI — the closest aminoindane with experimental toxicity data — showed strong liver toxicity in human liver cells and caused fatal clotting abnormalities with brain swelling in rats.[16][17][18] One human death involved MDAI at a blood level of 2.09 mg/L in a polydrug context.[19] Whether NM-2-AI shares these patterns is unknown — its lack of ring substitution may produce a different organ toxicity profile.
Human forensic cases
One confirmed fatality: Sioux City, Iowa, 2015 — NM-2-AI detected at 95.4 ng/mL in whole blood alongside a synthetic cannabinoid.[4] The polydrug context prevents definitive attribution. Seven additional suspected exposures were reported by the Pittsburgh Poison Center between 2020 and 2021.[4]
Overheating risk
NM-2-AI's norepinephrine-dominant pharmacology raises body temperature through sympathetic activation — independent of the serotonin release that drives overheating in entactogens. MDAI produced dangerous body temperature elevation in group-housed rats, amplified by warm social environments.[16] The same risk is plausible for NM-2-AI in hot or crowded settings.
Psychological Risks
Anxiety and agitation at higher doses are characteristic — norepinephrine excess is activating by nature. The short duration creates persistent pressure to redose, a pattern consistently noted in community reports. Post-session fatigue, low mood, and irritability follow as monoamine levels drop.
Stimulant psychosis — paranoia, hallucinations, and delusional thinking — is a class-level risk at high doses or with prolonged use. No case reports for NM-2-AI specifically have been published.
Tolerance & Dependence
No published data on NM-2-AI tolerance or dependence exist. Tolerance develops with repeated use; community sources estimate full reset at approximately 1.5 weeks, with cross-tolerance reported to other stimulants.inferred
Dependence potential is rated moderate by community consensus.safety citation needed MDAI produced reward-seeking behavior in mice at low doses,[17] confirming abuse potential exists across the aminoindane class.
Drug Interactions
Combining NM-2-AI with serotonergic drugs risks serotonin syndrome — a potentially life-threatening overheating and seizure response.[13] Even with NM-2-AI's primarily noradrenergic mechanism, SSRIs, SNRIs, MAOIs, tramadol, and other entactogens all create danger. The active metabolite 2-AI may contribute additional serotonergic interactions not predicted from the parent compound alone.[15]
Tramadol — rated lethal. Tramadol blocks serotonin reuptake and lowers seizure threshold; combining it with a monoamine releaser creates conditions for serotonin syndrome and seizures.safety citation needed
MDMA — rated dangerous. Two monoamine releasers together produce additive serotonin release, overheating risk, and cardiovascular overload.
MAOIs — rated dangerous. MAOIs block the enzyme that breaks down monoamines; combined with a releasing agent, uncontrolled monoamine buildup risks fatal blood pressure crisis and serotonin syndrome.
Genetic variability in the NAT2 enzyme — which clears the active metabolite 2-AI — means competing drugs may prolong active metabolite exposure.[15]
Contraindications
No substance-specific contraindication data have been published. The following are inferred from NM-2-AI's stimulant and monoamine-releasing pharmacologyinferred:
Absolute (class-level inference):
- Concurrent MAOI use — risk of fatal blood pressure crisis and serotonin syndrome
- Uncontrolled high blood pressure — noradrenergic activation elevates blood pressure further
- Severe heart condition — the 82% predicted cardiovascular toxicity probability[7] makes pre-existing cardiac disease high-risk
Relative (class-level inference):
- Seizure disorders — stimulants lower seizure threshold
- Liver impairment — impaired clearance could increase drug exposure
- Bipolar disorder or psychosis spectrum conditions — stimulant activation may trigger mania or psychotic episodes
- Pregnancy — no reproductive data exist; stimulant vasoconstrictors are contraindicated as a class in pregnancy
Harm Reduction[edit]
Forms & Identification
NM-2-AI does not produce distinctive color changes with common reagent test kits (Marquis, Mecke, Mandelin). A negative or ambiguous result does not confirm identity — it only rules out some other substance classes. Laboratory analysis (GC-MS or similar) is the only reliable confirmation method.
The compound originates entirely from unregulated synthesis. Batch purity varies unpredictably, and NM-2-AI has been found alongside other novel psychoactive substances in forensic seizures,[11] raising the possibility of contamination or mislabeling.
Guidelines
- Test substance identity with reagent kits to rule out dangerous substitutions, and ideally confirm with laboratory analysis
- Weigh doses with a milligram-precision scale — volumetric estimation of powders is unreliable
- Set a firm dose limit and timing plan before the session; do not carry extra material
- Start at the low end of the reported dose range and wait at least 90 minutes before considering a redose
- Stay hydrated but avoid overhydration — moderate sipping, not forced water intake
- Avoid use in hot environments or during intense physical activity
- Have a trusted person aware of what has been taken and when
- Do not combine with MAOIs, tramadol, MDMA, or other stimulants
Set & Setting
NM-2-AI produces a physically driven, alert state. Social environments may bring out mild prosocial effects; solitary use tends to amplify the restless, jittery quality. Planning a firm dose limit before the session begins is more effective than deciding in the moment.
The stimulant body load — elevated heart rate, physical tension — can become uncomfortable in hot, crowded, or physically demanding settings. A calm environment with access to water and fresh air reduces physiological strain.
Aftercare & integration. The comedown brings monoamine depletion — expect fatigue, low mood, and irritability in the 12–48 hours following use. Sleep is the most effective recovery tool. If stimulant residue prevents sleep, a dark quiet room and avoidance of screens help more than additional substances.
Eat a full meal within a few hours of the experience ending, prioritizing protein and complex carbohydrates. Magnesium supplementation may help with residual muscle tension.
If compulsive redosing occurred during the session, treat this as information about the compound's pharmacological profile — it should factor into future decisions about use.
Recovery & Support
NM-2-AI's moderate dependence potential and compulsive redosing profile mean that escalating patterns can develop without dramatic withdrawal. If use has become more frequent than intended, or if obtaining and using the substance occupies increasing mental bandwidth, these are early signals worth taking seriously.
Peer support communities — including online harm reduction forums and local mutual aid groups — provide non-judgmental spaces to discuss stimulant use. Professional support through a substance use counselor is appropriate when self-regulation has not been effective. SAMHSA's National Helpline (1-800-662-4357) offers free, confidential referral in the United States.
Recovery resources, crisis lines, and support pathways → View all
Emergency Response
Recognizing an emergency:
- Chest pain or pressure
- Seizure or convulsions
- Body temperature so high it can be felt through clothing
- Loss of consciousness or unresponsiveness
- Severe confusion, paranoia, or self-harm behavior
An elevated heart rate and mild anxiety alone do not constitute an emergency — chest pain, seizure, and extreme body temperature do.
Immediate steps:
- 1. Call emergency services if any of the above signs are present
- 2. Move the person to a cool, quiet area
- 3. If unconscious but breathing, place in the recovery position (on their side)
- 4. Do not restrain a conscious person unless there is immediate danger of self-harm
- 5. Do not induce vomiting
- 6. Stay with the person until help arrives
What to tell the dispatcher: Name the substance (NM-2-AI / N-methyl-2-aminoindane), the estimated amount taken, the time of ingestion, and current symptoms. Good Samaritan laws in many jurisdictions protect people who call for help during a drug emergency.
Legal Status[edit]
Legal Status
NM-2-AI is not controlled under any international drug control convention,[5] but national controls vary — several countries cover it through blanket new psychoactive substance legislation.
| Jurisdiction | Classification | Key provisions |
|---|---|---|
| International | Not controlled | Not scheduled under 1961, 1971, or 1988 UN conventions[5] |
| United States | Unscheduled (federal) | Not on DEA controlled substance schedules. May be subject to Federal Analogue Act as structural analog of methamphetamine if intended for human consumption. DEA issued formal alert May 2021[4] |
| United Kingdom | Illegal | Covered under Psychoactive Substances Act 2016 (blanket ban on psychoactive substances effective 26 May 2016) |
| Germany | Controlled | Regulated under Neue-psychoaktive-Stoffe-Gesetz (NpSG), effective 26 November 2016 |
| Switzerland | Controlled | Listed specifically under Verzeichnis E |
| China | 2-AI controlled (October 2015) | NM-2-AI status not specifically confirmed; 2-AI scheduling may encompass derivativescitation needed |
| Canada | Not specifically scheduled | May be subject to analog provisions under the Controlled Drugs and Substances Actcitation needed |
| Australia | Not specifically confirmed | Scheduling status not identified in reviewed literaturecitation needed |
Analog act considerations
In the United States, the Federal Analogue Act permits prosecution of substances "substantially similar" to scheduled drugs when intended for human consumption. NM-2-AI's structural relationship to methamphetamine creates potential liability under this provision. The DEA's 2021 formal alert[4] signals active surveillance interest that may precede future scheduling action.
references
- [1] ^abcSimmler LD, Rickli A, Schramm Y, Hoener MC, Liechti ME (2014) Pharmacological profiles of aminoindanes, piperazines, and pipradrol derivatives. — Biochemical Pharmacology doi:10.1016/j.bcp.2014.01.024
- [2] ^abcdHalberstadt A, Brandt S, Walther D, Baumann M (2019) 2-Aminoindan and its ring-substituted derivatives interact with plasma membrane monoamine transporters and alpha2-adrenergic receptors — Psychopharmacology doi:10.1007/s00213-019-05207-1
- [3] ^abcPinterova N, Horsley RR, Palenicek T (2017) Synthetic Aminoindanes: A Summary of Existing Knowledge. — Frontiers in Psychiatry doi:10.3389/fpsyt.2017.00236
- [4]
- [5]
- [6] ^abcdefgTirri M, Corli G, Arfe R, Marchetti B, Bilel S, Bernardi T, Boccuto F, Odoardi S, Mestria S, Strano-Rossi S, Marti M (2023) Behavioral and Pharmacokinetics Studies of N-Methyl-2-Aminoindane (NM2AI) in Mice: An Aminoindane Briefly Used in the Illicit Drug Market. — International Journal of Molecular Sciences doi:10.3390/ijms24031882