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    4F-NEB Encyclopedic
    Encyclopedic
    Typical encyclopedia coverage. Cross-reference for important decisions.
    • 1 source
    • 2 ROAs with full dose ladders
    • duration data present
    • 18 combo interactions documented

    Stimulant

    Summary TripSit

    The 4-Fluoro analogue of N-Ethylbuphedrone (NEB) is a part of the cathinone class.

    Dose Information TripSit

    ROA Light Common Strong Heavy
    Insufflated 50-75mg 75-150mg 150-250mg 250mg+
    Oral 75-100mg 100-150mg 150-300mg 300mg+
    Light Common Strong Heavy

    Onset, Duration & After-effects TripSit

    ROA Onset Peak After Effects
    Insufflated 5-10 min 0.83-1.67 hrs 1-12 hrs
    Oral 15-30 min 1.5-3 hrs 1-12 hrs

    Effect Profile

    class estimate

    Scores (1–10) curated from multiple sources:

    • Effect keyword matching from PsychonautWiki catalog
    • No reports exist for this substance. Its effect list is the one shared by 13 other substances of the same class, so the scores below describe the class, not this compound.
    • Weighted by importance: core (×3), major (×2), minor (×1)

    Full methodology

    Stimulant 6.5
    Strong 6/10

    Strong euphoria and anxiety/jitters with moderate focus and stimulation

    Stimulation / Energy ×3
    6
    stimulation wakefulness alertness enhancement
    Euphoria / Mood Lift ×2
    10
    physical euphoria euphoria cognitive euphoria motivation enhancement
    Focus / Productivity ×2
    7
    focus enhancement motivation enhancement thought acceleration
    ⚠ Anxiety / Jitters ×1
    10
    anxiety increased heart rate teeth grinding vasoconstriction
    View methodology →

    Add to PsychonautWiki Journal

    The PsychonautWiki Journal logging app doesn't include every substance. To track 4F-NEB there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:

    ⬇ Download import file Import this file as custom substances and you get "4F-NEB (Substance Search)" with every route's full dose ladder and timeline, no typing. Works on iOS and Android (v15+); the format is confirmed by the app's developer. The manual values below work for older versions.
    Name
    4F-NEB
    Unit
    mg
    Description 
    4F-NEB
Source: SubstanceSearch (substancesearch.com)

Insufflated dose (mg): light 50-75 · common 75-150 · strong 150-250 · heavy 250+
Oral dose (mg): light 75-100 · common 100-150 · strong 150-300 · heavy 300+

Insufflated duration: onset 5-10m · peak 0.83-1.67h · after-effects 1-12h
Oral duration: onset 15-30m · peak 1.5-3h · after-effects 1-12h

Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.

    Tip: for quicker logging you can also add a Custom Unit in the app, e.g. common dose ~ 112.5 mg (Insufflated).

    The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.

    Tolerance

    Build-up develops rapidly, often within a single session; compulsive redosing common
    Reset a few days for acute tolerance

    Tolerance Decay

    Full tolerance 1h Half tolerance 4d Baseline ~5d

    Effects

    Positive
    • Stimulation
    • Physical euphoria
    Negative
    • Increased heart rate
    • Vasoconstriction
    • Insomnia
    • Teeth grinding
    • Pupil dilation
    • Nausea
    • Increased perspiration
    Neutral
    • Decreased appetite
    Positive
    • Alertness enhancement
    • Euphoria
    • Wakefulness
    • Motivation enhancement
    • Cognitive euphoria
    • Focus enhancement
    Negative
    • Anxiety
    Neutral
    • Talkativeness
    • Time distortion
    • Thought acceleration
    Positive
    • Increased music appreciation
    • Tactile enhancement
    • Increased libido
    • Color enhancement
    • Enhanced tactile sensation
    Negative
    • Light sensitivity
    • Appetite suppression
    • Dehydration
    • Disinhibition
    Neutral
    • Drifting

    Combinations TripSit

    Cross-Check 4F-NEB with another substance

    4F-NEB's nerd page Pharmacology, chemical data, effect profiles, and more
    →

    Helpful Links

    📘 Experience Reports 📖 TripSit 📖 PsychonautWiki