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    2C-B-FLY-NBOMe molecular structure

    2C-B-FLY-NBOMe Stats & Data

    Cimbi-31 Nbome-2c-b-fly 2cbflynbome
    Chemical Class Phenethylamine
    Psychoactive Class Psychedelic
    Half-Life Plasma t½ ≈ 2.5 h; brain t½ ≈ 3.2 h in rats (Syrová 2023). Human elimination likely 3–5 h with subjective effects outlasting plasma presence.

    Receptor Profile

    Receptor Actions

    Agonists
    5-HT2A receptor agonist (partial, highest binding affinity among NBOMes)
    5-HT2C receptor agonist
    Alpha-1 adrenergic receptor agonist
    H1 histamine receptor agonist
    Dopamine D1-3 receptor agonist

    History & Culture

    2C-B-FLY-NBOMe was discovered in 2002 and subsequently researched by Ralf Heim at the Free University of Berlin. The compound was later investigated in greater detail by a research team at Purdue University led by pharmacologist David E. Nichols. Structurally, the substance represents a hybrid design that combines the rigid benzodifuran ring system characteristic of the FLY series with the N-benzyl substitution pattern found in NBOMe compounds.

    Effect Profile

    Curated
    Psychedelic 8.0

    Strong visuals, body load, and headspace with moderate auditory effects

    Visual Intensity×3
    10
    Headspace Depth×3
    9
    Auditory Effects×1
    7
    Body Load / Somatic Effects×1
    10
    Empathogen 4.9

    Strong sensory enhancement with moderate stimulation, mild euphoria, low empathy

    Empathy / Social Openness×3
    3
    Euphoria / Mood Elevation×2
    5
    Stimulation×1
    7
    Sensory Enhancement×1
    8

    Tolerance & Pharmacokinetics

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    Half-Life
    Plasma t½ ≈ 2.5 h; brain t½ ≈ 3.2 h in rats (Syrová 2023). Human elimination likely 3–5 h with subjective effects outlasting plasma presence.
    Addiction Potential
    Physiological dependence unlikely; psychological habituation possible with frequent use. Rapid tolerance and strong 5-HT2A receptor desensitization discourage daily or even weekly use.

    Tolerance Decay

    Full tolerance 2d Half tolerance 7d Baseline ~14d

    Rapid 5‑HT2A desensitization produces short-term tachyphylaxis (hours–days). Functional tolerance typically halves within ~1 week and returns to near-baseline by 2–3 weeks; cross-tolerance with other classic psychedelics is expected but not fully quantified.

    Cross-Tolerances

    LSD
    60% ●○○
    Psilocybin
    60% ●○○
    Mescaline
    50% ●○○
    Other NBOMes & 2C compounds
    70% ●○○

    Legal Status

    Country Status Notes
    United Kingdom Class A Controlled under the Misuse of Drugs Act 1971 through the N-benzylphenethylamine catch-all clause, which encompasses N-benzyl substituted phenethylamine derivatives. Class A substances carry the most severe penalties under UK law.
    United States Controlled (Vermont) Designated as a controlled substance in the state of Vermont since January 2016. State-level scheduling; federal status may vary.

    Harm Reduction

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    • Identity/testing: Because NBOMes are frequently sold on blotter as “acid,” always test. LSD gives a purple positive on Ehrlich reagent and typically fluoresces under UV; NBOMes do not fluoresce and have distinct reagent patterns. Marquis/Mecke are unreliable for confirming LSD but can flag NBOMe-like reactions; reagent testing cannot prove identity, only rule-in/out patterns. Use multiple reagents and, where possible, lab drug-checking.

    • Oral activity nuance: NBOMes were long thought orally inactive when swallowed, but some salts show measurable oral bioavailability. Do not assume a swallowed NBOMe blotter is inactive; discard blotter after buccal/sublingual application rather than swallowing if avoiding further exposure.

    • Microgram potency & volumetric dosing: Overdoses often stem from mismeasurement/static loss. Volumetric dosing substantially reduces risk: dissolve a precisely weighed amount into an appropriate solvent (e.g., high-proof ethanol or propylene glycol for poor water solubility), clearly label concentration, and measure volume for dosing.

    • Route risk: Intranasal use is linked to a disproportionate number of severe cases (agitation, hyperthermia, seizures, ischemia). If used intranasally, reduce dose substantially versus buccal/sublingual and avoid co-stimulants.

    • Vasoconstriction & heat risk: NBOMes can cause marked peripheral vasoconstriction (cold/numb digits, pallor/cyanosis) and hyperthermia/rhabdomyolysis at high doses. Keep ambient temperature moderate, avoid overexertion, and hydrate with electrolytes. Urgent care is indicated for chest pain, extreme agitation, limb discoloration/numbness, confusion, seizures, or hot/dry skin and altered consciousness.

    • Combination risks: Avoid serotonergic combinations (e.g., MDMA, DXM) due to serotonin toxicity; avoid stimulants (cocaine/amphetamines) due to compounding vasoconstriction/arrhythmia risk; avoid tramadol due to seizures. Cannabis and dissociatives can unpredictably potentiate effects—go slowly or avoid.

    • Acute management (for bystanders/clinicians): Calm, cooling, fluids and benzodiazepines are commonly used for severe agitation; antipsychotics may be used by professionals for frank psychosis but are not first-line for simple panic. Seek medical help early for hyperthermia or severe hypertension. Do not self-medicate with additional substances during a crisis.

    • Mislabeling: EU and US monitoring documented NBOMes sold as LSD or 2C drugs on blotter and as powders; treat unknown “LSD-like” blotter with caution.

    • Metabolism: Across NBOMe analogs studied in human liver microsomes and animals, major pathways include O-demethylation and N-debenzylation; inter-individual variability is likely. This may prolong or intensify effects in some users; titrate cautiously and avoid redosing in the same session.

    • Solubility/handling: Freebase NBOMes are poorly water-soluble; solutions in high-proof ethanol or mixed PEG-400/ethanol are used by some to prepare 50–500 µg/mL standards. Label and store away from light/heat; prevent skin/mucosa exposure when handling powders or solutions.

    • Tolerance/spacing: Response varies between sessions; a steep dose-response and rapid tolerance mean that redosing often adds side effects more than benefits. Space sessions by 2–3+ weeks to reduce tachyphylaxis and psychological after-load.

    References

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