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    Spirochlorphine molecular structure

    Spirochlorphine Stats & Data

    Spc R-6890
    NPS DataHub
    MW369.89
    FormulaC21H24ClN3O
    CAS3222-88-6
    IUPAC8-[1-(4-chlorophenyl)ethyl]-1-phenyl-1,3,8-triazaspiro[4.5]decan-4-one
    SMILESClc1ccc(cc1)C(C)N1CCC2(CC1)C(=O)NCN2c1ccccc1
    InChIKeyKFEYPBZJPJJRFX-UHFFFAOYSA-N
    Chemical Class Triazaspirodecanone
    Psychoactive Class Depressant

    Effect Profile

    Curated
    Opioid 7.9

    Strong euphoria and pain relief with moderate itching/nausea, mild sedation

    Euphoria / Warmth×3
    10
    Analgesia×2
    8
    Sedation / Relaxation×1
    5
    Itching / Nausea×1
    6

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    Est. 4–6 h (rodent data inference; human PK unknown)
    Addiction Potential
    High; potent μ-agonism with rapid tolerance and strong withdrawal suppression makes compulsive redosing likely.

    No tolerance chart. Our decay curves for opioids were estimates, and a curve can make tolerance look longer-lasting than it is, which is the dangerous direction.

    Opioid tolerance drops fast when you stop, and even a few days off can be enough, so a dose that used to be normal can now stop your breathing. Overdose deaths rise sharply after prison, detox or leaving treatment, and tolerance also falls during a hospital stay. After any break, start with a much smaller amount, try a test dose first, don't use alone, and keep naloxone within reach. Alcohol, benzodiazepines, gabapentinoids and other sedatives make an opioid overdose much more likely.

    Sources: FRANK: heroin · National Harm Reduction Coalition · WHO: opioid overdose · Merrall et al. 2010 · Binswanger et al. 2007 · Strang et al. 2003 · FDA 2019: gabapentinoids and breathing

    Cross-Tolerances

    fentanyl analogues
    benzimidazole opioids (e.g., isotonitazene class)

    Harm Reduction

    drugs.wiki

    Identity and pharmacokinetics are poorly characterized in humans; treat all doses as experimental and err on the side of extreme caution. Microgram-level potency reported by users means a small weighing error can be catastrophic; always use volumetric dosing with a clearly labeled, low-concentration solution, and perform an allergy test before any psychoactive dose. Fentanyl-class overdoses often require multiple naloxone administrations or a continuous infusion; have multiple naloxone units available and expect possible re-narcosis after initial reversal because naloxone is shorter-acting than many potent opioids. Inhalation/smoking is widely reported as inefficient and inconsistent; heat may degrade the drug and make dose control unreliable, increasing the risk of accidental redosing. If insufflating, rinse with sterile or isotonic saline before and after and rotate nostrils to reduce mucosal injury and infection risk. Injection has the highest lethality risk: if someone chooses to inject against advice, use new sterile equipment, sterile water, and a 0.22–0.30 µm wheel filter; avoid heating unknown powders, and never inject alone. Use-with-someone and staggered test dosing (waiting at least one full onset-to-peak window) reduce the chance of stacking doses during a delayed onset. Avoid combining with any CNS depressant (alcohol, benzos, z‑drugs, barbiturates, gabapentinoids), which greatly increases respiratory depression risk; people with sleep apnea, COPD, or low baseline respiratory reserve face heightened danger. Consider lab-based drug checking (FTIR/GC‑MS) where available to confirm identity and detect adulterants; mail-in or site-based services exist in multiple regions. Label and child-proof any prepared solution; store in light-protected containers at cool temperature to reduce degradation and accidental exposure. Because human metabolism is unknown, avoid CYP3A4/2D6 inhibitors or inducers when possible, and avoid QT‑prolongers as a precaution (some opioids—e.g., methadone—affect hERG). Dependency and tolerance can escalate rapidly; spacing use and planning for a naloxone-equipped, sober sitter are protective steps. Smoking and chasing on foil have been reported to waste material and give short, deceptive effects, leading some users to mistakenly escalate dose; do not assume lack of immediate effect means it is ‘weak.’

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