Home
    Disclaimer
    Etonitazene molecular structure

    Etonitazene Stats & Data

    Ea-4941 Cs-4640
    NPS DataHub
    MW396.49
    FormulaC22H28N4O3
    CAS911-65-9
    IUPAC2-[2-[(4-ethoxyphenyl)methyl]-5-nitrobenzimidazol-1-yl]-N,N-diethylethanamine
    SMILESCCOc1ccc(cc1)Cc1nc2cc(ccc2n1CCN(CC)CC)N(=O)=O
    InChIKeyPXDBZSCGSQSKST-UHFFFAOYSA-N
    Opioids; 2021/7. Von Benzimidazol abgeleitete Verbindungen; 2022/7. Von Benzimidazol abgeleitete Verbindungen
    Chemical Class Opioid
    Psychoactive Class Depressant
    Half-Life Unknown (no human PK data; duration likely hours, with reports of effects outlasting naloxone)

    Pharmacology

    DrugBank
    State Solid

    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
    Unknown (no human PK data; duration likely hours, with reports of effects outlasting naloxone)
    Addiction Potential
    Very high; potent mu-opioid receptor agonist with marked risk of dependence and severe withdrawal on repeated use.

    Tolerance Decay

    Full tolerance 2d Half tolerance 3d Baseline ~14d

    Pattern approximated from general opioid tolerance behavior (rapid build with repeated dosing; partial decay over 1–4 weeks) and mechanistic mu-receptor downregulation; specific etonitazene human data are lacking. Treat as a conservative harm-reduction estimate; individual variability is large.

    Cross-Tolerances

    Other mu-opioid agonists (e.g., heroin, morphine, fentanyl)
    70% ●○○

    Harm Reduction

    drugs.wiki

    Etonitazene is an ultra-potent benzimidazole opioid; class reports place it at roughly 1,000–1,500× morphine potency in animals, implying microgram-level human activity and an extreme overdose risk from tiny mismeasurements. It has appeared in the unregulated supply, sometimes sold as or alongside other opioids or as counterfeit pills; related etonitazene analogs have been detected in tablets marked as oxycodone. Nitazenes are often below the detection limits of common onsite spectrometers (e.g., FTIR at ~5% w/w), and available nitazene test strips may not reliably detect all analogs; lab-based drug checking is recommended. Mixed-depressant use (benzodiazepines, alcohol, GHB/GBL, Z-drugs, barbiturates) greatly increases the risk of rapid, profound respiratory depression and death. Co-use with gabapentinoids (gabapentin/pregabalin) is epidemiologically associated with higher opioid-related mortality and should be avoided. In suspected opioid poisoning, naloxone should be administered promptly; multiple repeat doses and prolonged monitoring can be required because nitazenes may outlast naloxone, with risk of renarcotization after initial reversal. Fentanyl test strips detect fentanyl-class opioids; they do not identify which nitazene is present and onsite tools can miss nitazenes—negative results do not guarantee safety. Never “eyeball” or guess amounts; microgram-active materials require precision handling, and insufflation or injection sharply elevates risk. Avoid using alone; ensure bystanders can recognize opioid overdose (unresponsiveness, slow or stopped breathing, pinpoint pupils) and can administer naloxone while calling emergency services.

    ← Back to Etonitazene