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1Provenance card

the boundary, as counts

Sources

3831 with DOI

0 strong · 23 moderate · 15 weak

Compilations

12026-05-03T14:47:41.533Z

pipeline-v5 · prompt hash not recorded — run predates 2026-09

Decisions

45last ruled 2026-06-04

0 awaiting a ruling

Issued documents

42026-10-19T20:32:55.054Z

notice · info card · emergency

Searches

300 with no results

queries and counts on the build

Claims checked

9471 supported

71 supported · 23 not

Correspondence

0received

consent field ships in Phase 4

Edges

314

derivations recorded for this entity

Complete over 38 sources, 1 compilation, and 45 decisions.Not here: the private journal (never).Working material — drafts, discards, unsupported claims — is listed below and readable on the working page.Cite: psychedex.org/substances/methoxetamine/archive

2Build

one panel per compilation run

generation run 2026-05-03

63 min completedmodel pipeline-v5plan not recordedrun/0296e99b…

Selection

results seen140
selected by the model46
consumed as sources38

Verification

claims checked94
supported65
partially supported6
not supported1
inconclusive22
  • record
  • seen / partial
  • working

The model's own caveats

  • sparse_evidence
  • data_gap

Reproduce

inputs
38 source keys (listed under Sources)
plan
not recorded — template version, prompt hash and git SHA are written from 2026-09 onward
model
pipeline-v5
streams
none — agent transcripts are persisted from 2026-09 onward
30 searches — query, source, results, what was kept and why
30 searches for this run
#sourcequeryseenkeptrationale
1PubMedmethoxetamine conditioned place preference reward reinforcing11—
2PubMedmethoxetamine death fatality post-mortem toxicology22—
3PubMedmethoxetamine pharmacology receptor binding43—
4PubChemMethoxetamine11—
5OpenAlexmethoxetamine pharmacology dissociative103—
6PubMedmethoxetamine metabolism metabolites human84—
7OpenAlexmethoxetamine MXE abuse toxicity102—
8ClinicalTrials.govmethoxetamine10—
9PubMedmethoxetamine human psychoactive effects subjective survey11—
10PubMedmethoxetamine antidepressant NMDA ketamine analog43—
11PubMedmethoxetamine toxicity case report overdose22—
12PubMedmethoxetamine MXE abuse dependence33—
13PubMedmethoxetamine rat neurotoxicity dopamine serotonin repeated11—
14WebSearchmethoxetamine Ki NMDA receptor SERT binding affinity nM Roth 2013101—
15WebSearchmethoxetamine MXE fatality 5.8 ug/mL blood death case single substance101—
16PubMedmethoxetamine cerebellar ataxia acute11—
17PubMedmethoxetamine acute toxicity hospital emergency intoxication21—
18WebSearchmethoxetamine MXE melting point physical properties solubility CAS number101—
19PubMedget article PMID 2342185911—
20WebSearchmethoxetamine MXE synthesis 2010 2011 bladder safe designer drug origin who created101—
21PubMedmethoxetamine pharmacokinetics tissue distribution animal/Palenicek21—
22PubMedmethoxetamine death fatality Wikstrom Sweden accidental11—
23WebSearchmethoxetamine MXE legal status UK US scheduling controlled substance history102—
24WebSearchmethoxetamine MXE scheduling Australia Canada EU legal status controlled substance date101—
25PubMedPMID 25060403 Wiergowski methoxetamine amphetamine fatal polydrug11—
26PubMedPMID 25413263 Adamowicz Zuba fatal MXE intoxication11—
27PubMed/WebSearchmethoxetamine bladder toxicity urinary tract published study evidence102Both papers directly refute seed data; must be included in research output as critical correction
28PubMedmethoxetamine serotonergic 5-HT2 receptors pharmacological behavioral rat new insights11—
29MultipleBladder toxicity seed data vs published literature22—
30WebSearchmethoxetamine Ki NMDA receptor SERT binding affinity nM Roth 2013101—
94 claims by section — every cited sentence, checked against its source
safety35 · 30 ok
  • Adamowicz & Zuba (2015) reported the first published single-substance MXE fatality, with post-mortem blood concentration of 5.8 µg/mLsupported

    Fatal MXE intoxication; blood MXE concentration 5.8 mcg/mL. First confirmed fatal single-substance MXE intoxication published. 1556-4029.12594

  • Wikström et al. (2013): 26-year-old male, femoral blood MXE 8.6 µg/g, with co-detected synthetic cannabinoids (AM-694, AM-2201, JWH-018, THC). Reference concentrations from four living users: 0.13–0.49 µg/g.supported

    26-year-old male found dead; femoral blood MXE 8.6 mcg/g + synthetic cannabinoids AM-694, AM-2201, JWH-018, THC. Reference blood concentrations from living subjects: 0.13-0.49 mcg/g. bks086

  • Wiergowski et al. (2014): 31-year-old male, serum MXE 0.32 µg/mL with amphetamine 0.06 µg/mL. Clinical course: hyperthermia >39°C, generalized seizures, rhabdomyolysis, hepatic failure, acute renal failure, multi-organ dysfunction, death at 4 weeks.supported

    31-year-old male admitted in deep coma after MXE + amphetamine use. MXE serum 0.32 mcg/mL (toxic range), amphetamine 0.06 mcg/mL (non-toxic). Presented with hyperthermia >39C, generalized seizures, massive rhabdomyolysis, hepatic failure, acute renal failure, multi-organ dysfunction. Died 4 weeks post-poisoning. s13382-014-0290-8

  • Claim in safety — inconclusiveinconclusiveworking →

  • Chiappini et al. (2015) provided a national overview of UK MXE-related deaths during 2011–2013supported

    MXE-related fatalities in UK 2011-2013 documented. Provides mortality overview from UK national data. hup.2422

  • Elliott & Evans (2014) documented MXE as one of the most frequently detected novel psychoactive substances in UK forensic casework during 2010–2012.supported

    2010-2012: 203 NPS cases. MXE in top detected substances. j.forsciint.2014.04.017

  • Shields et al. (2012) reported three analytically confirmed cases presenting with reversible cerebellar toxicity — a distinctive and potentially diagnostic presentation for high-dose MXE exposuresupported

    Three cases of acute neurological toxicity associated with analytically confirmed methoxetamine exposure. Reversible cerebellar toxicity documented. 15563650.2012.683437

  • Imbert et al. (2014) documented the most detailed cardiovascular presentation in a 21-year-old male after intranasal MXE:supported

    21-year-old male: sinus bradycardia (48/min), ST-segment elevation, elevated creatine kinase, hyponatremia after MXE inhalation. bku052

  • Dargan et al. (2014) administered MXE to mice (30 mg/kg i.p. daily for 3 months) and documented significant bladder inflammation with subsequent fibrosis and renal toxicity at both tubular and glomerular levels.supported

    Three months daily MXE (30 mg/kg i.p.) produced significant bladder and renal toxicity in mice: inflammatory changes with subsequent fibrosis in bladder, tubular and glomerular changes in kidney. 15563650.2014.892605

  • Wang et al. (2017) provided detailed characterization in female rats (30 mg/kg/day i.p. for 4–12 weeks):supported

    Female rats: 30 mg/kg MXE i.p. for 4 or 12 weeks caused increased micturition frequency, damaged urothelium, inflammatory cell infiltration. ijms18010117

  • Costa et al. (2019) demonstrated persistent neurotoxic damage following repeated low-dose MXE in rats (0.1–0.5 mg/kg every other day, 5 doses):supported

    Repeated MXE induced persistent anxiety, impaired memory, dopaminergic damage in mPFC/NAcc/caudate-putamen/SNpc/VTA and accumbal serotonergic damage in rats. j.neuropharm.2018.10.031

  • Extreme agitation, aggression, confusion, hallucinations, amnesia, tachycardia (serum 270 ng/mL, urine 660 ng/mL)partially supported

    28-year-old male, intranasal MXE: extreme agitation/aggression, confusion, hallucinations, tachycardia 120/min. MXE serum 270 ng/mL, urine 660 ng/mL. pmid:24466717

  • Claim in safety — inconclusiveinconclusiveworking →

  • Claim in safety — inconclusiveinconclusiveworking →

  • Anxiogenesis: Low doses produce increased anxiety in rodent models (thigmotaxis, decreased centre time); human reports describe dose-dependent anxietysupported

    5 and 10 mg/kg induced locomotor stimulation and anxiogenesis. j.brainresbull.2016.05.002

  • Cognitive impairment: Repeated exposure produces persistent non-spatial memory deficits in animal models (novel object recognition impairment 8 days post-challenge)supported

    Repeated MXE induced persistent anxiety, impaired memory, dopaminergic damage. j.neuropharm.2018.10.031

  • Psychotomimetic effects: PPI disruption at all tested doses indicates psychotomimetic potential consistent with the arylcyclohexylamine classsupported

    Behavioral effects in rats: locomotor hyperactivity and disruption of prepulse inhibition confirmed. s00213-016-4203-3

  • Berquist et al. (2018) demonstrated that MXE substitutes for PCP in drug discrimination and reverses PCP withdrawal signs in rats, confirming cross-tolerance at the NMDA receptor levelsupported

    MXE produced PCP-lever selection in drug discrimination without behavioral disruption. MXE partially reversed PCP withdrawal. j.neuropharm.2017.08.028

  • Conditioned place preference: MXE (2.5–5 mg/kg) induces CPP comparable to ketamine (5 mg/kg)supported

    MXE (2.5 and 5 mg/kg) induced CPP comparable to ketamine. j.pbb.2015.03.007

  • Self-administration: Rats self-administer MXE (0.25–1.0 mg/kg/infusion), though MXE is a less effective reinforcer than PCPpartially supported

    Modest self-administration rates. j.pbb.2015.03.007

  • Self-administration: Rats self-administer MXE (0.25–1.0 mg/kg/infusion), though MXE is a less effective reinforcer than PCPsupported

    MXE was less effective reinforcer than PCP. j.neuropharm.2017.08.028

  • Mesolimbic dopamine: MXE substitutes for ketamine in self-administration and enhances dopaminergic transmissionsupported

    MXE substitutes for ketamine in self-administration. MXE enhances mesolimbic dopaminergic transmission. s00213-016-4275-0

  • The confirmed SERT inhibition (Ki = 479 nM) means any co-administration with serotonergic agents carries serotonin syndrome risksupported

    MXE showed appreciable affinity for serotonin transporter. journal.pone.0059334

  • Claim in safety — inconclusiveinconclusiveworking →

  • Synthetic cannabinoids: Documented in a polydrug fatality (MXE 8.6 µg/g with AM-694, AM-2201, JWH-018)supported

    femoral blood MXE 8.6 mcg/g + synthetic cannabinoids AM-694, AM-2201, JWH-018, THC. bks086

  • The single documented MXE + amphetamine fatality (Wiergowski et al. 2014) produced hyperthermia, rhabdomyolysis, and multi-organ failuresupported

    Presented with hyperthermia >39C, generalized seizures, massive rhabdomyolysis, hepatic failure, acute renal failure, multi-organ dysfunction. s13382-014-0290-8

  • Cardiovascular disease: ST-segment changes and bradycardia documented; pre-existing cardiac conduction abnormalities may be exacerbatedsupported

    sinus bradycardia (48/min), ST-segment elevation... after MXE inhalation. bku052

  • Seizure disorders: New seizure activity documented in casessupported

    Seizures during hospitalization. bku052

  • Claim in safety — not_supportednot supportedworking →

  • Hepatic impairment: CYP2B6/CYP3A4-dependent metabolism — impaired clearance in hepatic diseasesupported

    CYP2B6 and CYP3A4 catalyze initial N-deethylation. s00216-013-7051-6

  • Renal impairment: Documented renal toxicity in animals; impaired excretionsupported

    tubular and glomerular changes in kidney. 15563650.2014.892605

  • Concurrent serotonergic medications: SERT inhibition at Ki = 479 nM creates serotonin syndrome risksupported

    MXE showed appreciable affinity for serotonin transporter. journal.pone.0059334

  • History of urological disease: Animal data demonstrate bladder toxicitysupported

    inflammatory changes with subsequent fibrosis in bladder. 15563650.2014.892605

  • History of urological disease: Animal data demonstrate bladder toxicitysupported

    damaged urothelium, inflammatory cell infiltration, elevated IL-1beta/IL-6... interstitial fibrosis. ijms18010117

  • Psychotic disorders: Psychotomimetic effects (PPI disruption at all doses) may precipitate episodessupported

    disruption of prepulse inhibition confirmed. s00213-016-4203-3

pharmacology13 · 8 ok
  • Claim in pharmacology — inconclusiveinconclusiveworking →

  • Claim in pharmacology — inconclusiveinconclusiveworking →

  • In vivo microdialysis confirmed MXE (0.25–0.5 mg/kg i.v.) significantly elevated serotonin in the medial prefrontal cortex and nucleus accumbens.supported

    In vivo microdialysis: MXE (0.25-0.5 mg/kg i.v.) significantly altered serotonin levels in rat mPFC and NAcc. j.expneurol.2021.113836

  • Claim in pharmacology — inconclusiveinconclusiveworking →

  • The antidepressant mechanism parallels ketamine's: NMDA blockade triggers downstream AMPA receptor activation (confirmed by NBQX blockade of antidepressant effects), which in turn activates mTOR phosphorylation and upregulates GluA1 and GluA2 AMPA subunit protein levels in hippocampus and prefrontal cortexpartially supported

    MXE produced antidepressant effects at 30 min sustained 24 h via AMPA and 5-HT2 receptor mechanisms. Blocked by NBQX and ketanserin. j.neuropharm.2017.08.038

  • Claim in pharmacology — inconclusiveinconclusiveworking →

  • Ketanserin blockade of antidepressant effects confirms 5-HT₂ receptor involvement in this cascade.supported

    Blocked by NBQX and ketanserin. j.neuropharm.2017.08.038

  • MXE enhances mesolimbic dopaminergic transmission and substitutes for ketamine in self-administration paradigmssupported

    MXE substitutes for ketamine in self-administration. MXE enhances mesolimbic dopaminergic transmission. s00213-016-4275-0

  • Coppola & Mondola (2012) hypothesized MXE activity at dopamine D₂, sigma-1, opioid mu and kappa, and muscarinic cholinergic receptorspartially supported

    Hypothesis: MXE as NMDA antagonist, dopamine reuptake inhibitor, D2/5HT2/sigma-1/opioid mu and kappa agonist. j.mehy.2012.07.002

  • Claim in pharmacology — inconclusiveinconclusiveworking →

  • Horsley et al. (2016) provide the most detailed PK characterization (Wistar rats, 10 mg/kg s.c.):supported

    Behavioural PK and metabolic characterization in rats. 5 and 10 mg/kg induced locomotor stimulation and anxiogenesis. j.brainresbull.2016.05.002

  • Meyer et al. (2013) identified CYP enzyme involvement via in vitro human liver microsomal studies:supported

    CYP2B6 and CYP3A4 catalyze initial N-deethylation. Eight metabolites identified. s00216-013-7051-6

  • Menzies et al. (2014) confirmed phase I and II metabolites in urine from three patients with acute MXE toxicitysupported

    Phase I and II metabolites characterized by LC-HRMS. Major metabolites confirmed in urine from 3 acute MXE toxicity patients. dta.1541

summary12 · 10 ok
  • The modification produces a longer-acting dissociative profile (4–6 hours oral) at lower weight-based doses than ketamine, with substantial brain tissue accumulation (brain:serum ratio 2.06–2.93).partially supported

    Brain:serum ratio 2.06-2.93 throughout observation. Duration exceeds ketamine. j.brainresbull.2016.05.002

  • Claim in summary — inconclusiveinconclusiveworking →

  • Despite early commercial framing as a research chemical, its pharmacological profile attracted scientific investigation into antidepressant mechanisms paralleling ketamine's NMDA–AMPA–mTOR cascadesupported

    MXE produced antidepressant effects at 30 min sustained 24 h via AMPA and 5-HT2 receptor mechanisms. j.neuropharm.2017.08.038

  • Claim in summary — inconclusiveinconclusiveworking →

  • This dual mechanism — absent in ketamine — engages 5-HT₂ receptor signalling as a critical mediator of both motor and sensory effectssupported

    5-HT2 receptors confirmed as key mediators of MXE sensorimotor effects. j.expneurol.2021.113836

  • A single-substance fatality has been documented (post-mortem blood 5.8 µg/mL)supported

    Fatal MXE intoxication; blood MXE concentration 5.8 mcg/mL. First confirmed fatal single-substance MXE intoxication published. 1556-4029.12594

  • Acute toxicity presentations include reversible cerebellar dysfunction, cardiovascular compromise (bradycardia, ST-segment elevation), and rhabdomyolysis in polydrug contextssupported

    Reversible cerebellar toxicity documented. 15563650.2012.683437

  • Acute toxicity presentations include reversible cerebellar dysfunction, cardiovascular compromise (bradycardia, ST-segment elevation), and rhabdomyolysis in polydrug contextssupported

    21-year-old male: sinus bradycardia (48/min), ST-segment elevation... after MXE inhalation. bku052

  • Acute toxicity presentations include reversible cerebellar dysfunction, cardiovascular compromise (bradycardia, ST-segment elevation), and rhabdomyolysis in polydrug contextssupported

    Presented with hyperthermia >39C, generalized seizures, massive rhabdomyolysis, hepatic failure, acute renal failure, multi-organ dysfunction. s13382-014-0290-8

  • Chronic animal studies demonstrate bladder inflammation, fibrosis, and renal damage — directly contradicting marketing claims of urological safetysupported

    inflammatory changes with subsequent fibrosis in bladder, tubular and glomerular changes in kidney. MXE marketed as 'bladder friendly' but no data supports this claim. 15563650.2014.892605

  • Chronic animal studies demonstrate bladder inflammation, fibrosis, and renal damage — directly contradicting marketing claims of urological safetysupported

    damaged urothelium, inflammatory cell infiltration... interstitial fibrosis. Direct toxic and pro-inflammatory effects on human urothelial cells. ijms18010117

  • Repeated low-dose exposure in rats produces persistent dopaminergic and serotonergic neurotoxicitysupported

    dopaminergic damage in mPFC/NAcc/caudate-putamen/SNpc/VTA and accumbal serotonergic damage in rats. j.neuropharm.2018.10.031

history7 · 3 ok
  • Claim in history — inconclusiveinconclusiveworking →

  • Claim in history — inconclusiveinconclusiveworking →

  • Claim in history — inconclusiveinconclusiveworking →

  • Corazza et al. coined the street name "Special M" — a deliberate parallel to ketamine's "Special K" — in documenting MXE's recreational trajectory from online markets to nightlife environments.supported

    Reviews ketamine and MXE recreational use. MXE emerged as bladder-friendly KET alternative. cns.12063

  • The compound was actively marketed as a "bladder-friendly" and safer alternative to ketaminesupported

    MXE marketed as 'bladder friendly' but no data supports this claim. 15563650.2014.892605

  • Corazza et al. (2012) characterized MXE's rapid internet dissemination as a public health challenge requiring coordinated international regulatory response, documenting the compound's availability across multiple online vendor platforms during the 2010–2012 period.supported

    Critical discussion of online availability as public health challenge. hup.1242

  • Claim in history — inconclusiveinconclusiveworking →

pharmacokinetic-detail6 · 5 ok
  • Horsley et al. (2016) conducted the most comprehensive pharmacokinetic evaluation in Wistar rats (10 mg/kg s.c.):supported

    Behavioural PK and metabolic characterization in rats. 5 and 10 mg/kg induced locomotor stimulation and anxiogenesis. j.brainresbull.2016.05.002

  • Meyer et al. (2013) characterized the metabolic pathway using in vitro human liver microsomes and recombinant CYP enzymes:supported

    Phase I and II metabolites in rat and human urine. CYP2B6 and CYP3A4 catalyze initial N-deethylation. s00216-013-7051-6

  • Menzies et al. (2014) confirmed these pathways in human clinical specimens from three MXE-intoxicated patients, identifying normethoxetamine, O-desmethylmethoxetamine, dihydromethoxetamine, dehydromethoxetamine, hydroxymethoxetamine isomers, and hydroxynormethoxetamine as phase I products.supported

    Major metabolites confirmed in urine from 3 acute MXE toxicity patients: normethoxetamine, O-desmethylmethoxetamine, dihydromethoxetamine, glucuronide conjugates. dta.1541

  • Immunoassay cross-reactivity: MXE may produce false-positive results on amphetamine immunoassayssupported

    Initial immunoassay gave false positive for amphetamines. pmid:27339480

  • Confirmatory methods: GC-MS and LC-MS/MS validated for blood, urine, and hair matricespartially supported

    Phase I and II metabolites in rat and human urine. s00216-013-7051-6

  • Claim in pharmacokinetic-detail — inconclusiveinconclusiveworking →

receptor-pharmacology6 · 2 ok
  • The comprehensive receptor binding profile derives from Roth et al. (2013), who screened MXE against 57 molecular targets through the NIMH Psychoactive Drug Screening Program:supported

    Pharmacological profiles of ketamine and PCP analogues via NIMH PDSP. journal.pone.0059334

  • Notably, the PDSP screen found no significant affinity at dopamine D₂, sigma-1, opioid mu/kappa, muscarinic cholinergic, or norepinephrine transporter (NET) sites — contradicting earlier hypotheses.supported

    Hypothesis: MXE as NMDA antagonist, dopamine reuptake inhibitor, D2/5HT2/sigma-1/opioid mu and kappa agonist. j.mehy.2012.07.002

  • Claim in receptor-pharmacology — inconclusiveinconclusiveworking →

  • Claim in receptor-pharmacology — inconclusiveinconclusiveworking →

  • Claim in receptor-pharmacology — inconclusiveinconclusiveworking →

  • Claim in receptor-pharmacology — inconclusiveinconclusiveworking →

effects-overview4 · 4 ok
  • MXE's subjective character is shaped by its dual pharmacology — NMDA antagonism producing classical dissociative disconnection, overlaid with serotonergic modulation that lends a warmer, more emotionally coloured quality absent from ketaminesupported

    MXE inhibits NMDA-mediated field potentials and GABA-mediated spontaneous currents. 5-HT2 receptors confirmed as key mediators of MXE sensorimotor effects. j.expneurol.2021.113836

  • Set and setting exert strong modulatory influence across all dose ranges — anxiogenic environments amplify the dysphoric potential that rodent models confirm at low doses.supported

    5 and 10 mg/kg induced locomotor stimulation and anxiogenesis. j.brainresbull.2016.05.002

  • MXE occupies a position between ketamine and phencyclidine in the dissociative landscape — longer-acting and more potent by weight than ketamine, but less stimulating and less reinforcing than PCPsupported

    MXE was less effective reinforcer than PCP. MXE produced hypothermia but not locomotor stimulation. j.neuropharm.2017.08.028

  • The serotonergic dimension distinguishes MXE from both, contributing perceptual and emotional textures that users describe as qualitatively distinct from pure NMDA antagonists.supported

    Survey of UK polydrug users on MXE prevalence, subjective effects, motivations for use. dar.12259

neuroscience4 · 3 ok
  • Marti et al. (2021) demonstrated via in vivo microdialysis that MXE (0.25–0.5 mg/kg i.v.) significantly elevates extracellular serotonin in medial prefrontal cortex and nucleus accumbenssupported

    In vivo microdialysis: MXE (0.25-0.5 mg/kg i.v.) significantly altered serotonin levels in rat mPFC and NAcc. j.expneurol.2021.113836

  • Costa et al. (2019) documented persistent damage following repeated low-dose MXE (0.1–0.5 mg/kg every other day, 5 doses, i.p., rats):supported

    Repeated MXE induced persistent anxiety, impaired memory, dopaminergic damage in mPFC/NAcc/caudate-putamen/SNpc/VTA and accumbal serotonergic damage in rats. j.neuropharm.2018.10.031

  • This mechanism is confirmed indirectly by the PPI disruption observed at all tested doses, which reflects impaired sensorimotor gating mediated by cortico-striato-pallido-thalamic circuits.supported

    disruption of prepulse inhibition confirmed. s00213-016-4203-3

  • Claim in neuroscience — inconclusiveinconclusiveworking →

clinical-evidence3 · 3 ok
  • Botanas et al. (2021) provided the stereochemistry-resolved comparison:supported

    R(-)-MXE and S(+)-MXE both show NMDA receptor affinity and SERT inhibition. R-MXE showed fewer behavioral side effects. j.neuropharm.2021.108619

  • These effects were blocked by NBQX (AMPA antagonist) and ketanserin (5-HT₂ antagonist), establishing the glutamatergic–serotonergic dual mechanism.supported

    Blocked by NBQX and ketanserin. j.neuropharm.2017.08.038

  • The R(−)-MXE enantiomer has been identified as a potential development candidate given its reduced abuse liability profile while retaining full antidepressant efficacy.supported

    R-MXE showed fewer behavioral side effects (no CPP, no hyperlocomotion, no PPI deficits) compared to S-MXE. j.neuropharm.2021.108619

comparative-pharmacology3 · 2 ok
  • The duration difference is explained by MXE's sustained brain tissue accumulation — peak brain levels at 30 minutes with slow release over 6 hours — versus ketamine's rapid redistribution out of CNS tissue.supported

    Brain levels peaked at 30 min, declined to near-zero at 6h. Duration exceeds ketamine. j.brainresbull.2016.05.002

  • Berquist et al. (2018) characterized MXE's relationship to PCP through drug discrimination and self-administration:supported

    MXE produced PCP-lever selection in drug discrimination without behavioral disruption. MXE was less effective reinforcer than PCP. j.neuropharm.2017.08.028

  • Claim in comparative-pharmacology — inconclusiveinconclusiveworking →

chemistry1 · 1 ok
  • De Paoli et al. (2013) confirmed the structural identity of street-sourced MXE samples via GC-MS and NMR spectroscopy, verifying the compound as 2-(ethylamino)-2-(3-methoxyphenyl)cyclohexanone.supported

    MXE obtained from online retailer and characterized by GC-MS, NMR, DAD. Confirmed structure as 2-(ethylamino)-2-(3-methoxyphenyl)cyclohexanone. bkt023

3Sources

38 consumed · sorted by year · feeds = sections resting on it

Sources 1 to 30
yearsourcetierstatusfeeds
2024Methoxetamine - PubChem Compound CID 52911279National Library of Medicineurl:f27b690c36e300b1weakconsumedcited only
2024Methoxetamine and its metabolites: Postmortem determination in body fluids of human cadaverBursová M, Hložek T, Sokol M, Židká M, Čabala R · Journal of Analytical Toxicologydoi:10.1093/jat/bkad084weakconsumed1 section
2022Potential of High-Resolution Mass Spectrometry for the Detection of Drugs and Metabolites in Hair: Methoxetamine in a Real Forensic CaseMatey JM, Lopez-Fernandez A, Garcia-Ruiz C, Montalvo G, Moreno MD, Martinez MA · Journal of Analytical Toxicologydoi:10.1093/jat/bkaa168weakconsumed1 section
2021New insights into methoxetamine mechanisms of action: Focus on serotonergic 5-HT2 receptors in pharmacological and behavioral effects in the ratMarti M, Talani G, Miliano C, Bilel S, Biggio F, Bratzu J, Diana M, De Luca MA, Fattore L · Experimental Neurologydoi:10.1016/j.expneurol.2021.113836moderateconsumed5 sections
2021R (-)-methoxetamine exerts rapid and sustained antidepressant effects and fewer behavioral side effects relative to S (+)-methoxetamineBotanas CJ, Perez Custodio RJ, Kim HJ, de la Pena JB, Sayson LV, Ortiz DM, Kim M, Lee HJ, Acharya S, Kim KM, Lee CJ, Ryu JH, Lee YS, Cheong JH · Neuropharmacologydoi:10.1016/j.neuropharm.2021.108619moderateconsumed4 sections
2021Schedules of Controlled Substances: Placement of Methoxetamine (MXE) in Schedule IUS Drug Enforcement Administrationurl:20fd7efdaad933d8weakconsumedcited only
2019The novel psychoactive substance methoxetamine induces persistent behavioral abnormalities and neurotoxicity in ratsCosta G, Serra M, Pintori N, Casu MA, Zanda MT, Murtas D, De Luca MA, Simola N, Fattore L · Neuropharmacologydoi:10.1016/j.neuropharm.2018.10.031moderateconsumed3 sections
2018Neurological, sensorimotor and cardiorespiratory alterations induced by methoxetamine, ketamine and phencyclidine in miceOssato A, Bilel S, Gregori A, Talarico A, Trapella C, Gaudio RM, De-Giorgio F, Tagliaro F, Neri M, Fattore L, Marti M · Neuropharmacologydoi:10.1016/j.neuropharm.2018.08.017moderateconsumedcited only
2018Phencyclidine-like in vivo effects of methoxetamine in mice and rats.Berquist MD, Hyatt WS, Bauer-Erickson J, Gannon BM, Norwood AP, Fantegrossi WE · Neuropharmacologydoi:10.1016/j.neuropharm.2017.08.028moderateconsumed3 sections
2017Ketamine Analog Methoxetamine Induced Inflammation and Dysfunction of Bladder in RatsWang Q, Wu Q, Wang J, Chen Y, Zhang G, Chen J, Zhao J, Wu P · International Journal of Molecular Sciencesdoi:10.3390/ijms18010117moderateconsumed2 sections
2017Methoxetamine produces rapid and sustained antidepressant effects probably via glutamatergic and serotonergic mechanismsBotanas CJ, Bryan de la Pena J, Custodio RJ, Joy Dela Pena I, Kim M, Woo T, Kim HJ, Kim HI, Chang Cho M, Lee YS, Cheong JH · Neuropharmacologydoi:10.1016/j.neuropharm.2017.08.038moderateconsumed3 sections
2016An Impaired Driver Found to be Under the Influence of MethoxetamineFassette T, Martinez A · Journal of Analytical Toxicologypmid:27339480weakconsumed1 section
2016Detailed pharmacological evaluation of methoxetamine (MXE), a novel psychoactive ketamine analogue-Behavioural, pharmacokinetic and metabolic studies in the Wistar ratHorsley RR, Lhotkova E, Hajkova K, Jurasek B, Kuchar M, Palenicek T · Brain Research Bulletindoi:10.1016/j.brainresbull.2016.05.002moderateconsumed6 sections
2016International Drug Scheduling: Methoxetamine (MXE) CND Schedule IIUS Federal Register / CNDurl:f5c6cc58d4ed613cweakconsumedcited only
2016Methoxetamine: An early report on the motivations for use, effect profile and prevalence of use in a UK clubbing sampleWinstock AR, Lawn W, Deluca P, Borschmann R · Drug and Alcohol Reviewdoi:10.1111/dar.12259moderateconsumed1 section
2016Salting-out-assisted liquid-liquid extraction as a suitable approach for determination of methoxetamine in large sets of tissue samplesHajkova K, Jurasek B, Sykora D, Palenicek T, Miksatkova P, Kuchar M · Analytical and Bioanalytical Chemistrydoi:10.1007/s00216-015-9221-1moderateconsumed1 section
2016The ketamine-like compound methoxetamine substitutes for ketamine in the self-administration paradigm and enhances mesolimbic dopaminergic transmissionMutti A, Aroni S, Fadda P, Padovani L, Mancini L, Collu R, Muntoni AL, Fattore L, Chiamulera C · Psychopharmacologydoi:10.1007/s00213-016-4275-0moderateconsumed2 sections
2016The novel ketamine analog methoxetamine produces dissociative-like behavioral effects in rodentsHalberstadt AL, Slepak N, Hyun J, Buell MR, Powell SB · Psychopharmacologydoi:10.1007/s00213-016-4203-3moderateconsumed3 sections
2015Fatal intoxication with methoxetamineAdamowicz P, Zuba D · Journal of Forensic Sciencesdoi:10.1111/1556-4029.12594weakconsumed2 sections
2015Methoxetamine-associated emergencies. First Spanish descriptions of this new drugNogue S, Galicia M, Parra M, To-Figueras J · Medicina Clinicadoi:10.1016/j.medcli.2015.01.018weakconsumed1 section
2015Methoxetamine-related deaths in the UK: an overviewChiappini S, Claridge H, Corkery JM, Goodair C, Loi B, Schifano F · Human Psychopharmacologydoi:10.1002/hup.2422moderateconsumed1 section
2015Methoxetamine, a ketamine derivative, produced conditioned place preference and was self-administered by rats: Evidence of its abuse potentialBotanas CJ, de la Pena JB, Dela Pena IJ, Tampus R, Yoon R, Kim HJ, Lee YS, Jang CG, Cheong JH · Pharmacology, Biochemistry, and Behaviordoi:10.1016/j.pbb.2015.03.007moderateconsumed1 section
2014A 3-year review of new psychoactive substances in caseworkElliott S, Evans J · Forensic Science Internationaldoi:10.1016/j.forsciint.2014.04.017moderateconsumed1 section
2014Acute methoxetamine and amphetamine poisoning with fatal outcome: a case reportWiergowski M, Anand JS, Krzyzanowski M, Jankowski Z · International Journal of Occupational Medicine and Environmental Healthdoi:10.2478/s13382-014-0290-8weakconsumed2 sections
2014Analytical findings of an acute intoxication after inhalation of methoxetamineImbert L, Boucher A, Delhome G, Cueto T, Boudinaud M, Maublanc J, Dulaurent S, Descotes J, Lachatre G, Gaulier JM · Journal of Analytical Toxicologydoi:10.1093/jat/bku052weakconsumed2 sections
2014Characterizing metabolites and potential metabolic pathways for the novel psychoactive substance methoxetamineMenzies EL, Hudson SC, Dargan PI, Parkin MC, Wood DM, Kicman AT · Drug Testing and Analysisdoi:10.1002/dta.1541moderateconsumed2 sections
2014Three months of methoxetamine administration is associated with significant bladder and renal toxicity in miceDargan PI, Tang HC, Liang W, Wood DM, Yew DT · Clinical Toxicologydoi:10.3109/15563650.2014.892605moderateconsumed3 sections
2013Acute methoxetamine intoxication - a case report with serum and urine concentrationsLukasik-Glebocka M, Sommerfeld K, Tezyk A, Zielinska-Psuja B, Druzdz A · Przeglad Lekarskipmid:24466717weakconsumed1 section
2013An accidental fatal intoxication with methoxetamineWikström M, Thelander G, Dahlgren M, Kronstrand R · Journal of Analytical Toxicologydoi:10.1093/jat/bks086weakconsumed1 section
2013From "Special K" to "Special M": the evolution of the recreational use of ketamine and methoxetamineCorazza O, Assi S, Schifano F · CNS Neuroscience and Therapeuticsdoi:10.1111/cns.12063moderateconsumed1 section
Show all 38 sources — 8 more
Sources 31 to 38
yearsourcetierstatusfeeds
2013From the street to the laboratory: analytical profiles of methoxetamine, 3-methoxyeticyclidine and 3-methoxyphencyclidine and their determination in three biological matricesDe Paoli G, Brandt SD, Wallach J, Archer RP, Pounder DJ · Journal of Analytical Toxicologydoi:10.1093/jat/bkt023moderateconsumed1 section
2013Government bans methoxetamine or 'mexxy'UK Home Officeurl:1c811e1694f6b1eaweakconsumedcited only
2013Ketamine-derived designer drug methoxetamine: metabolism including isoenzyme kinetics and toxicological detectability using GC-MS and LC-(HR-)MSnMeyer MR, Bach M, Welter J, Bovens M, Turcant A, Maurer HH · Analytical and Bioanalytical Chemistrydoi:10.1007/s00216-013-7051-6moderateconsumed3 sections
2013The ketamine analogue methoxetamine and 3- and 4-methoxy analogues of phencyclidine are high affinity and selective ligands for the glutamate NMDA receptorRoth BL, Gibbons S, Arunotayanun W, Huang XP, Setola V, Treble R, Iversen L · PLoS ONEdoi:10.1371/journal.pone.0059334moderateconsumed4 sections
2012Methoxetamine associated reversible cerebellar toxicity: three cases with analytical confirmationShields JE, Dargan PI, Wood DM, Puchnarewicz M, Davies S, Waring WS · Clinical Toxicologydoi:10.3109/15563650.2012.683437weakconsumed2 sections
2012Methoxetamine: from drug of abuse to rapid-acting antidepressantCoppola M, Mondola R · Medical Hypothesesdoi:10.1016/j.mehy.2012.07.002moderateconsumed2 sections
2012Out with the old, in with the new? Case reports of the clinical features and acute management of two novel designer drugsMisselbrook GP, Hamilton EJ · Acute Medicinepmid:22993747weakconsumed1 section
2012Phenomenon of new drugs on the Internet: the case of ketamine derivative methoxetamineCorazza O, Schifano F, Simonato P, Fergus S, Assi S · Human Psychopharmacology Clinical and Experimentaldoi:10.1002/hup.1242moderateconsumed2 sections

4Docket

one filing per activity — decisions, correspondence, reports

  1. 0012026-05-03revisionRevision 1

    Initial LLM generation (v5 pipeline, wiki)

    psx:substance/methoxetamine/version/1
  2. 0022026-06-04proposal43 value proposals approved together

    one review action inferred from a shared reviewer and instant — the graph records one activity per proposal

    43 items in this filing

    • dose_tier · light
    • dose_tier · common
    • dose_tier · strong
    • dose_tier · heavy
    • timeline · oral · onset
    • timeline · oral · come_up
    • timeline · oral · peak
    • timeline · oral · plateau
    • timeline · oral · resolution
    • timeline · oral · afterglow
    • timeline · insufflated · onset
    • timeline · insufflated · come_up
    • timeline · insufflated · peak
    • timeline · insufflated · plateau
    • timeline · insufflated · resolution
    • timeline · insufflated · afterglow
    • toxicity
    • dependence · full
    • withdrawal
    • tolerance
    • dosage · oral
    • dosage · insufflated
    • duration · oral · onset
    • duration · oral · come_up
    • duration · oral · peak
    • duration · oral · offset
    • duration · oral · total
    • duration · oral · aftereffects
    • duration · insufflated · onset
    • duration · insufflated · come_up
    • duration · insufflated · peak
    • duration · insufflated · offset
    • duration · insufflated · total
    • duration · insufflated · aftereffects
    • contraindication · cardiovascular
    • contraindication · neurological
    • contraindication · hepatic
    • contraindication · renal
    • contraindication · psychiatric
    • contraindication · other
    • contraindication · other
    • contraindication · pregnancy_breastfeeding
    psx:substance/methoxetamine/proposal/dose_tier/debaf670-23b8-4ed0-9cd8-26cb34b84434
  3. 0032026-06-04publicationPublication — backfill

5Issued documents

what the notice, info card and emergency page said, by hash

Issued documents
documentcontent hashissuedfrom versionsuperseded
info_card3ec5aa6a410b348328a24025…2026-10-19 20:32Revision 1current
emergencyba304cf8bf8de5b4ec66cb2b…2026-09-04 04:31Revision 1current
info_cardf0f1bda0e27acd220db2a457…2026-09-04 04:31Revision 1superseded2026-10-19
notice27e962140c82221a79ab0df4…2026-09-04 04:31Revision 1current