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    ☠ Nitazene-class opioids are extremely potent, often exceeding fentanyl in strength. Even trace amounts can be fatal. Fentanyl test strips do NOT detect nitazenes — a negative strip does not rule one out. Naloxone works, but often needs repeated doses, and re-sedation can follow once it wears off: call emergency services and stay with the person.

    Etonitazepipne Limited data
    Limited data
    Sparse data. Doses and effects may be unreliable or untested.
    • 1 source
    • no dose data

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